compression ring活塞: plunger; stop; bibb cock; bi ...平: flat; level; even; smooth环: ring; hoop活塞平横式: balanced piston type活塞平均速度: mean piston speed; mean pistons peed下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:活塞平环，即可在微信中查询翻译
