Zipper is a kind of connector which can make the articles join or separate by means of the chain teeth arranged continuously. Now it is widely used in clothing, bags, tents and so on. Zipper is a fastener composed of two strips with a row of metal teeth or plastic teeth, which is used to connect the edge of the opening (such as clothes or bag mouth). A sliding piece can pull the two rows of teeth into the interlocking position to close the opening. Zipper is used to connect to something (as a suspended or dropped object) to tighten, stabilize or guide the chain of the object.

The zipper is composed of chain teeth, pull head, up and down stop (front and back) or locking parts. The chain tooth is the key part, which directly determines the side pull strength of the zipper. General zipper has two pieces of chain belt, each piece of chain belt has a row of chain teeth, two rows of chain teeth crisscross each other. The pulling head holds the chain teeth on both sides, and the chain teeth on both sides can be meshed or separated by sliding with the help of the pulling loop.

Source: @aittattoo_

Tattoos are very common in today’s society. Basically, there are always people around who have tattooed. Nowadays, with the change of people’s ideas, tattoo is also something that many people will do.

Maybe in the past, tattoos were done by some social talents, but now the patterns of tattoos are getting smaller and fresher, and many girls will also have some patterns on their bodies. And there are some patterns that have special meanings.

Source: @_dudink_

Helmet is a device to protect the head, a hat worn by soldiers during training and combat, and an indispensable tool in people’s transportation. It is divided into military helmets, police helmets and civilian helmets. It is mostly semicircular, mainly composed of shell, lining and suspension device. The shell is made of special steel, glass fiber reinforced plastic, reinforced plastic, leather, nylon and other materials to resist the head damage caused by warhead, shrapnel and other striking objects.

Helmets can be traced back to ancient times. In pursuit of wild animals and fighting, primitive people used coconut shells and other fibrous materials as well as armadillo shells and turtle shells to protect their heads. To stop the attack. Later, with the development of metallurgical technology and the need of war, the metal helmet was invented. The earliest metal helmet abroad is the bronze helmet made around 800 BC.

Source: @ariyatattooshiraz

Endless knot, also known as Chinese knot, is an ancient traditional hand woven handicraft. In China, auspicious knot represents auspicious, rich and peaceful meaning. Auspicious knot has seven ears and wings, so it is also called “seven circle knot”. This knot often appears on the clothes of Chinese monks and the ornaments of temples. It is an ancient and auspicious knot, so it is named “auspicious knot”.

Endless knot can be evolved into a multi petaled auspicious flower, which is very beautiful. In the combination of knot decoration, if you add the auspicious knot, it means good luck, peace, and peace. Auspicious knot is an extension of the cross knot. It is also one of the ancient decorative knots, which means auspicious and auspicious. It is one of the most popular knots in China. The knitting method is simple, the knot shape is beautiful, and the variety is many, the application is very wide, when used alone, if hanging heavy objects, the knot shape is easy to deform, can be fixed with setting glue.

Source: @97s.tattoo

Asparagus is the seedling of asparagus, a perennial herb of asparagus, which can be used as vegetable. The unearthed white bamboo shoots are called white bamboo shoots, and the unearthed green ones are called green bamboo shoots. Even if the production area is different, no matter which asparagus varieties, as long as the sun will become green asparagus, buried in the soil or shading the sun, the color of asparagus will be white.

The selenium content of asparagus is higher than that of common vegetables, close to that of mushroom, and even comparable to that of sea fish and shrimp. In a word, from the analysis results of amino acids, zinc, copper, iron, manganese and selenium in white and green shoots, it can be seen that the content of amino acids and trace elements in green shoots is higher than that in white shoots except aspartic acid.

Source: @_val.d._