How does the drill work?


Drill Machine Working

Anyone who has done something at home will have a drill or a cordless screwdriver in his possession. You put them in, push a button and you’re ready to go.

Think about whether you need to drill all the holes manually or tighten all the screws manually. That would be a lot of work. For this reason, we would like to explain more clearly how such a drill or cordless screwdriver works today.

Operation Of The Handheld Power Drill

A drilling machine consists essentially of two parts, an electric motor, and a gearbox. In a final article, we explain how an electric motor works.

This would go beyond the scope here. Now ask yourself, why do you only need a drill, a drill, known by a car or tractor? Electric motors usually have very high speeds, so they work steadily and roundly. The drill should not turn so fast.

The speed is controlled by the drill through the gearbox. Good drills have two different vitals, one fast and one slow. Some may change the direction of rotation, but this can also be controlled by the electric motor under certain conditions.

Drill application areas

Of course, there are many applications. Every metalworking company has many large drills. Doors also have one or other models in their small workshops.

Even among special people, you can see drill kits in garages. Most of them are also cheap on the internet that is bought here.

Not only large drills but cordless screwdrivers are also very practical. Every house has one nearby because they are very interested in turning a screw into a wall. Cordless screwdrivers work similar to drills but operate with a 12-18V battery voltage, not 220V.

The new models work with lithium-ion batteries because they have virtually no self-discharge and have a very high energy density.

Mother’s Day In Germany

mothers day

The Origionation Of The Mother’s Day In Germany

Mother’s Day is one of the few German festivals that have no ecclesiastical roots. Since the festival always falls on the second Sunday in May, it is also a public holiday.

However, in some days, Happy Mother’s Day 2018  and Pentecost fall on the same date. The tradition comes from the USA and was only exported to Europe at the beginning of the 20th century. It was probably the flower industry.

In some places, the tradition of Mother’s Day is traced back to antiquity and brought into harmony with the Roman Cybele cult. Other similar approaches were provided by Mothering Day in England in the 13th century.

However, the fact is that the present form is more likely to be traced back to the women’s movement in the US and Britain, namely Methodist Anna Marie Jarvis.

This demanded a Mother’s Day of Peace already in the 1860s and in 1914 reached the enforcement of Mother’s Day by the US Congress.
An interesting detail is that the “inventor” wanted to quickly abolish this Mother’s Day due to its unmistakably commercial nature, which it did not succeed.

Mother’s Day Celebration in Germany

Mother’s Day actually came to Germany through the Association of German Flower Shop Owners. This is the US tradition in 1922 with a poster campaign and the slogan “Honor the mother”.

For the public holiday, however, Mother’s Day was first declared by the National Socialists, who also introduced maternal ordinations and the mother’s cross.
Mother’s Day was held in the Federal Republic of Germany but is regarded as an agreement for various business associations without state anchoring.

A Comprehensive Study About Allergic Vacuum Cleaner?

How To Define An Allergic Vacuum Cleaner?

An allergic vacuum cleaner is a device that is equipped with a particularly high filter class. For this, you have to know that the vacuum cleaner filters in Europe are subject to a fixed standard.

A higher class certifies that the filters work better, but these filter systems must work properly and be clean. Only in this way can the allergy-free vacuum cleaners achieve a clean result from a test.

In order to provide a definition of the allergy vacuum cleaner, we would like to start with the function of the normal vacuum cleaner.

With most conventional household vacuum cleaners, it seems to be difficult to maintain a good suction performance while filtering the particulate matter. Since the vacuum bag or the filter sets, the performance is reduced.

What Is A HEPA Filter?

This is precisely what is prevented by a HEPA filter, as used in an allergy vacuum cleaner. The HEPA filter systems simultaneously maintain the suction power and fix the dust particles so that they are not released back to the room air. This is indispensable for a clean result.

Anti-Allergic Vacuum Cleaner

There are also special anti-allergic vacuum cleaners that work with an electric brush. Such an allergy can also be removed by cleaning the dirt particles and allergens.

For this purpose, the electric brush is adjusted by the allergic vacuum cleaner to the appropriate height of the textile material or the carpet, get more information about top 10 best buy vacuum cleaners reviews

In this way, animal hair and other debris can be removed well, which plays an important role, especially for allergy sufferers.

In combination with a turbo brush, this cleaning with the allergic vacuum cleaner succeeds even better. Upholstery nozzles and other special attachments are also available to help create an allergen-free zone.

Often the allergic vacuum cleaners are systems that are constructed without filter bags. Here comes the sucked dirt in the designated container.

What Is An Air Vortex System?

An air vortex inside the allergic vacuum cleaner ensures that all dust particles remain on the outside of the container: This is due to the centrifugal force generated by the centered air flow.

An additional filter for the allergic vacuum cleaner ensures that even fine dust particles do not escape to the outside again. This is a high degree of innovation of the modern allergic vacuum cleaner from a test.

If an allergic vacuum cleaner is equipped with several filters, the ambient air becomes particularly clean and fresh.

The Choice Of An Excellent Dog


Two thousand trillion times diluted blood can smell?! Why the dog’s nose so sensitive?!

Recently a CCTV program “challenge impossible” there was a dog contestant, blood search dog “grassroots” CCTV staged a “Guards” challenge.

This combing “double-horsetail” Springer Spaniel fulfilled the challenge of “special setting” by international criminal investigation expert Dr. Li Changyu, finding out from the 2,000 trillion-fold dilution of the sample the “drop Blood “sample!

As we all know, the nose is the most German Longhaired Pointer dog perceived organ, we humans rely on the environment to observe the environment and access to information is the eyes, and the dog by the nose.

Their sensitive sense of smell is mainly manifested in the degree of sensitivity to the smell and odor recognition. We often describe a dog’s nose as a “dog’s nose” when it’s sensitive, showing how good the dog’s sense of smell is.

Even untrained ordinary dogs, but also more sensitive than the human nose more hidden in the end what is the secret behind it?

Dog nose dual channel system

When we inhale, our sense of smell and breath pass through the same airway. The dog’s nose has a dual-channel system inside. The fold in the nostril separates the two functions.

The air separates into different paths. One (red) path of air flows into the sniffing zone for odor analysis. The other path (blue Color) through the pharynx (black part) to the lungs to complete oxygen exchange and maintain blood oxygen levels.

Up to 300 million olfactory receptors

Dogs have far more olfactory receptors than humans, and humans have an average of about 5 million olfactory receptors, while dogs can have up to 300 million.

  1. Species Number of olfactory receptors
  2. Human 500 million
  3. 125 million dachshund
  4. Fox 147 million
  5. Beagle 225 million
  6. German shepherd 225 million
  7. Hunting blood dog 300 million

Moreover, the part of the dog’s brain that specializes in the analysis of odors, on a pro-rated basis, is 40 times more powerful than ours.

The second set of olfactory system

In addition to the above two points, the dog has a second set of olfactory system that we humans do not have. This secondary olfactory system consists of an organ called “Jacobson” in English, which can be translated into a “vomitus”.

The Vomer nasal is located at the bottom of the dog’s nasal passages and is designed to detect hormones (sex hormones). Dogs can separate the taste of the opposite sex hormones from the complex odors without being disturbed by other odors.

Because the vomer nasal device has its own neurotransmitter, the system-specific signal that conducts hormones goes to specific parts of the brain. It’s like having your own dedicated computer server. This is also the result of natural evolution, contribute to the dog’s reproductive and DNA extension.

Large ears auxiliary

Some dogs, especially hounds, have a flickering pair of big ears, which are also good helpers for dogs’ sense of smell.

As the dog moves along the ground, the flying ears help to incite the smell into its nose, so the large ears the smell of a dog is better than a dog with a small ear.

Below to give you a list of recognized good sense of smell dog breeds

  • Pointer hunting dog
  • German hairy pointer hunting dog
  • Proud hound
  • Springer Spaniel (Grassroots is Springer oh)
  • Mariano dog
  • Labrador retriever
  • German shepherd (black back)
  • Beagles
  • Basset Hound

The first kind of Web proxy principle is particularly simple

Ordinary agent

The HTTP client sends a request message to the proxy. The proxy server needs to properly handle the requests and connections (for example, correctly handle Connection: keep-alive), send a request to the server, and forward the received response to the client.

The following picture from the “HTTP authority guide”, visually shows the above behavior:

If I access the A website through a proxy, for A, it treats the proxy as a client, completely undetectable of the real client, which achieves the purpose of hiding the client IP.

Of course, the agent can also modify the HTTP request headers, by X-Forwarded-IPtelling a true client server IP such as custom head.

However, the server can not verify that this custom header was actually added by the proxy or the client modified the request header, so extra care should be taken when obtaining the IP from the HTTP header field.

This part can refer to my previous ” HTTP request header X-Forwarded-For ” article.

Explicitly designated browsers to the browser, you need to manually modify the browser or operating system settings, or specify the PAC (Proxy Auto-Configuration, automatic configuration file) automatically set, and some browsers support WPAD (Web Proxy Autodiscovery Protocol, Web Proxy auto-discovery protocol).

Explicitly specify the browser proxysite This method is generally called forward proxy, the browser enables the forward proxy, the HTTP request message will make some changes to avoid some of the problems of the old proxy server, this part can refer to My previous ” Http request header Proxy-Connection ” this article.

Another situation is that when visiting a website, the actual visit is the proxy. After the proxy receives the request message, it sends a request to the server that actually provides service, and forwards the response to the browser.

This situation is generally referred to as reverse proxy, which can be used to hide server IP and port.

After the general use of reverse proxy, you need to resolve the DNS domain name resolution to the proxy server IP, then the browser cannot detect the existence of the real server, of course, do not need to modify the configuration.

Reverse Proxy is the most common way to deploy a Web system, such as this blog is to use Nginx’s.

HTTP Proxy

HTTP proxy principle and implementation

Web Proxy is an entity that exists in the middle of the network and offers a wide range of functions. In modern network system, Web proxy is everywhere. In my previous blog post about HTTP, I mentioned several times the effect of proxies on HTTP requests and responses. This article today, I intend to talk about some of the principles of the HTTP proxy itself, and how to quickly implement the proxysite with Node.js.

HTTP proxy exists in two forms, which are briefly described as follows:

The first is a generic proxy as described in RFC 7230 – HTTP / 1.1: Message Syntax and Routing, the first part of the revised RFC 2616, HTTP / 1.1 protocol. This agent acts as a “middleman,” which is the server for the clients that connect to it; it is the client for the server to connect to. It is responsible for sending HTTP packets back and forth between the two ends.

The second is Tunneling TCP based protocols through Web proxy servers, which describe the tunneling agents described in the tunneling of TCP-based protocols through the Web proxy. It communicates through the body of the HTTP protocol and implements any TCP-based application layer protocol proxy in HTTP.

This proxy uses the CONNECT method of HTTP to establish a connection, but CONNECT was not initially part of RFC 2616 – HTTP / 1.1. The description of CONNECT and the tunnel proxy was not added until the release of HTTP / 1.1 in 2014. See RFC 7231 – HTTP / 1.1: Semantics and Content. In fact, this agent has long been widely implemented.

The first type of proxy described in this article corresponds to Chapter 6 “Proxy” in the “HTTP Authoritative Guide,” and the second type corresponds to Section 8.5, “Integration Points: Gateways, Tunnels and Trunks,” in Chapter 8, “Tunneling.

In search of Best Portable Air Compressor

International club on a tall, it has only four members, heads of research have attracted the attention of many top scientists and engineers, this club is GNSS (Global Navigation Satellite System), four members are the US GPS, the European Galileo GALILEO, Russia GLONASS GLONASS, China Compass COMPASS. Cricket Highlights

China Beidou is a new member, but also the development momentum of the most fierce members, Beidou is Editor’s Note? What is the impact on our lives? This is a very interesting topic. On the Big Dipper, there are many articles in academic journals, but too many proxy site professional articles of terminology, ordinary people do not read, but will not be interested to read.

Media and the network also have some introductory articles, most of the achievements of the Government to highlight the propaganda draft, the content is fragmented, not easy to comprehensively understand the reader, and many articles of argument is not accurate, apparently written by non-professionals. Science and technology reports are not written by the scientific and technological people, but the literary journalist caught pen, this phenomenon is the chronic disease reported by domestic science and technology.

Because of professional reasons, I have been concerned about the Big Dipper best portable air compressor, but many years of communication professional basic course teaching practice, I will be complex professional issues described in popular language features. I took advantage of two months of free time, access to a large number of a public offering of information, combing out this comprehensive introduction to the Beidou satellite science long text.

1, starting from the GPS for youtube proxy

October 4, 1957, the Soviet Union launched the world’s first man-made earth satellite, creating a human space century. The United States is paying close attention to it, there is a man named Bill Gay mathematician and a physicist named George Winkenbach, who in Hopkins gold Applied Physics Laboratory found a phenomenon, that is, The frequency of the satellite shift, the study found that the relative motion caused by Doppler frequency shift effect.

The two scientists conducted an experimental study and found that if the ground set up multiple receivers, according to the different frequency of the received signal to infer the specific location of the satellite, they are pleased to tell the results of this study The laboratory director Frank. McClure said they had achieved a Doppler tracking of Soviet satellites.


Atlantic Eye Care – The Best Family Eye Care Provider

The best health eye care possible eye health Atlantic proudly serves the local community optometrist is a large network with the best family eye care provider. since the last time you.

Eye Care

about to eyes, you get to choose the Atlantic eye care patients to serve more than 20 years who is a good thing to remember and eye care treatment will result in more of received.

so other eye centers full pledged their eye center to be most favorable. Patients sensitive and extraordinary maintenance, you can expect the surgery and treatment. Eye problems about completely relaxed, it is important to feel confident and conscious. They are specialized in protecting and improving the eye health back. Hoster, They are professionals and I know exactly what is best for you according to your needs. The kindness, caring, compassion and ways to promote open societies and we have family involvement.

unblock YouTube said the site shut down is an accident

unblock youtube offers a free VPN to Unblock YouTube and use the built-in PPTP VPN client to connect to YouTube & Unblocks Club. According to the official introduction of the maximum 1.6Mbit / s, it is clear that the speed is sufficient, HD 480P video is no problem, Mothers Day Images

to provide users with a very smooth viewing speed of the film.Official
no need to install any additional VPN software, as long as the start PPTP VPN client can use a PPTP-based free VPN account: Special Days

The current free account number:

PPTP Server:
PPTP username: free
PPTP Password: free Proxy Site

In order to ensure that we share, this free VPN  apk downloader connection will be interrupted every 2 hours. Each time you connect VPN, users will be redirected to a website youtube proxy, to activate the VPN session.Taxi

Also, this VPN also supports mobile Internet access.

You just in the windows control panel to build a VPN link, fill in the above link address, user name, password. Tell you a secret: the VPN can not only see youtube unblocked but also over the wall yet. And the speed is very fast, really cool.