网络释义
1)escape valve,放汽阀2)steam escape valve,放汽阀3)bypass blow-off valve,旁通放汽阀4)blast cock,放气阀，放汽阀5)venting valve,放汽阀，空气门6)emergency blowdown valve,紧急排污阀，危急放汽阀7)BDV (blow-down valve),疏水阀，再热旁路放汽阀，排污阀8)release of steam,放汽9)steam escape,放汽10)disengaged vapor,释放汽