Syringe is a common medical appliance. As early as the 15th century, the Italian cartinel put forward the principle of syringe. It mainly uses a needle to extract or inject gas or liquid. Syringes can also be used for medical equipment, containers, such as some scientific instruments in chromatography, through the rubber diaphragm injection.

The emergence of syringes is an epoch-making revolution in the field of medical appliances. The process of extracting and injecting gas or liquid with a needle is called injection. The syringe is composed of a syringe with a small hole in the front end and a matching piston core rod, which is used to inject a small amount of liquid or it into or extract from the inaccessible areas by other methods. When the core rod is pulled out, the liquid or gas is inhaled from the small hole in the front end of the syringe, and the liquid or gas is extruded when the core rod is pushed in.

Source: @08_tattoo

Do you know the meaning of Anemone? Not everyone’s love is beautiful, romantic and sweet in imagination. Your love may also be more pitiful, maybe you like people do not like you, you can not talk about sweet love. At this time, you can buy anemone to give to each other, saying that you will slowly forget her and no longer like her.

The legend of Anemone in Greek mythology. One day, the arrow of love accidentally shot Aphrodite, the God of beauty, and let her fall in love with the American boy Adonis. But Adonis was killed by a boar during a hunt, and the blood from him turned into a lotus. Another way is that the queen of the underworld, prociffeni, also loves the American Teenager Adonis, but Aphrodite has broken the contract and did not return it to Adonis. This angered the queen, so she ordered the boar to attack Adonis.

Source: @aeri_tattoo

Slingshot became popular in 1970s and 1980s. The Slingshot is a kind of cold weapon or game tool. The Slingshot is generally composed of bow frame, rubber band and leather pocket. It is generally made of branches of trees in the shape of “Ya”. The upper two ends of the elastic band are tied with rubber band, and the middle part of the elastic band is tied with a piece of leather wrapping the projectile.

The power of the Slingshot depends on the tension of the rubber band and the rebound speed of the rubber band. The greater the tension of the rubber band is, the heavier the projectile can be matched. The faster the rebound speed of the rubber band is, the greater the initial speed of the projectile can be provided. The heavier the projectile is and the higher the initial speed is, the greater the power will be. According to the launching mechanism, the Slingshot can be divided into two types: bow plate Slingshot and rubber band Slingshot. The arched Slingshot has the most primitive arched Slingshot and Slingshot crossbow.

Source: @666tatu