带有皮下注射器针头进行注射的注射器活塞。
A piston syringe that is fitted with a hypodermic needle for giving injections.
当柱塞被压下以注射液体时，柱塞在针筒内作轴向运动，而活塞则是固定的。
As the plunger is depressed to inject the fluid the plunger moves axially in the barrel while the piston is stationary.
示例性注射器可以包括驱动活塞，其适合于与注射管的柱塞连接。
An exemplary injector may include a drive ram that is adapted to interface with a plunger of a syringe.
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