safety governor安全: safe; secure; safety; securi ...调速器: governor; speed controller; ...调速器控制安全阀: governor control safety valve调速器: governor; speed controller; speeder安全调查: safety inspections; safety study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:安全调速器，即可在微信中查询翻译
