浮子操动防爆水银开关 float operated switch: 浮子控制开关explosion proof switch: 防爆开关explosion-proof switch: 防爆式开关float operated: 由浮子控制的explosion proof: pipe; 防暴的; 防爆的; 防止爆炸的下载手机词典可随时随地查词查翻译