emergency valve安全阀: safety valve紧急: urgent; pressing; critical; ...阀: established house or power g ...紧急安全阀: pop safety valve紧急阀: alarm valve; emergency valve; pop valve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:安全阀紧急阀,即可在微信中查询翻译