piston ring guard活塞: plunger; stop; bibb cock; bi ...防护: protect; shelter; shield; gu ...器: implement; utensil; ware活塞环防护器: piston ring guard活塞防尘罩: dust seal for piston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:活塞防护器，即可在微信中查询翻译
