美標(biāo)凸耳式硬密封蝶閥
采用標(biāo)準(zhǔn) Adoption standard設(shè)計(jì)標(biāo)準(zhǔn)Design standard:AP1609-83法蘭連接尺寸 Flange connection dimension:ANSI B 16.5結(jié)構(gòu)長度 Structure length:ANSI B16.10-1992壓力試驗(yàn) Pressure test:AP1 598-82
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