HB 20028-2011 带双收紧螺母不对称四通管接头(1Cr11Ni2W2MoV) HB 20016-2011 带收紧螺母三通管接头(1Cr11Ni2W2MoV) HB 20022-2011 带收紧螺母不对称三通管接头(1Cr11Ni2W2MoV) HB 20007-2011 带收紧螺母直通管接头(1Cr11Ni2W2MoV) HB 20023-2011 带双收紧螺母三通管接头(1Cr18Ni9Ti) HB 20017-2011 带双收紧螺母四通管接头(1Cr18Ni9Ti) HB 20024-2011 带双收紧螺母三通管接头(0Cr18Ni9) HB 20026-2011 带双收紧螺母不对称四通管接头(1Cr18Ni9Ti)