safety by-pass安全: safe; secure; safety; securi ...旁通管: bypass pipe; 安全旁通管；安全放泄管: safety by-pass全旁通安全阀: full by-pass relief valve; full bypass safety valve全旁通降压阀: full bypass pressure relief 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:安全旁通管，即可在微信中查询翻译
