GB/T3749.1-1983卡套式隔壁直角管接头GB/T3749.1-1983
面议GB/T3749.1-1983卡套式隔壁直角管接头GB/T3749.1-1983
面议GB/T3748.1-1983卡套式隔壁直通管接头GB/T3748.1-1983
面议GB/T3747.1-1983卡套式焊接管接头GB/T3747.1-1983
面议GB/T3746.1-1983卡套式四通管接头GB/T3746.1-1983
面议GB/T3745.1-1983卡套式三通管接头GB/T3745.1-1983
面议GB/T3744.1-1983卡套式锥螺纹直角三通管接头GB/T3744.1-1983
面议GB/T3743.1-1983卡套式端直角三通管接头GB/T3743.1-1983
面议GB/T3742.1-1983卡套式锥密封螺纹三通管接头GB/T3742.1-1983
面议GB/T3741.1-1983卡套式端三通管接头GB/T3741.1-1983
面议GB/T3740.1-1983卡套式直角管接头GB/T3740.1-1983
面议GB/T3739.1-1983卡套式锥螺纹直角管接头GB/T3739.1-1983
面议GB/T3783.1-1983卡套式端直角管接头GB/T3783.1-1983
面议