【化】 活柱泵

axial plunger pump fuel feed pump plunger radial plunger oil pump pump plunger shaft oil pump plunger oscillating plunger pump injection pump plunger plunger pump main plunger plunger tappet press plunger pump plunger power plunger pump electrical plunger pump triplex plunger pump variable stroke plunger pump steam plunger pump plunger-type pump differential plunger pump deep-well plunger pump