1. plunger
It consists of two main parts: an outer casing, which is hollow but closed on one end, and the piston itself—a rod or plunger that fits the hole in the casing perfectly and whose tip reaches almost, but not quite, to the stoppered end of the tube.
plunger rod
英語 "という言葉przepychacz do rur"(plunger)集合で発生します。
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