Full making process syringe in factory
A syringe is a simple reciprocate pump consisting of a plunger (though in modern syringes, it is actually a piston) that fits tightly within a cylindrical tube called a barrel. The plunger can be linearly pulled and pushed along the inside of the tube, allowing the syringe to take in and expel liquid or gas through a discharge orifice at the front (open) end of the tube. The open end of the syringe may be fitted with a  needle a nozzle  or tubing  to direct the flow into and out of the barrel. Syringes are frequently used in clinic to administer injection infuse intravenous  into the bloodstream, apply compounds such as glue  or lubricant , and draw/measure liquids. There are also prefilled syringe  (disposable syringes marketed with liquid inside).
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