Automatic Jet Hypodermic Injection Apparatus Injection Piston

Description
An item utilizing the reciprocating motion of a pump piston or plunger in an enclosure directly connected by a threaded stem to an actuator. The reciprocating motion is induced by the manual depressing of two triggers alternately; one to effect the backward motion and the other to effect the forward motion. It is dependently operated as a means of transferring metered doses of vaccine from one location to another.

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