| 摘要 |
A syringe for hypodermic injections comprising a cylindrical body inside which a plunger is fitted so as to be slideable and actuatable by means of a stem that protrudes from an open end of the cylindrical body. An internally hollow needle is associated with the opposite end of the cylindrical body and is adapted to retract inside the cylindrical body, actuated by an elastic element, at the end of the injection.
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