淮安双头外丝直接 VN
淮安单头外丝直接 VWN
淮安双头螺纹长接 VLN
淮安单头螺纹长接 VWLN
淮安直通式内丝 VSO
淮安短形直通式内丝 VHSO
淮安厚壁直通式内丝 WPS
淮安双头内丝 WPTS
淮安单头内丝 WHPTS
淮安六角螺纹短接 WM6N
淮安六角异径接头 WMRN
淮安有边内丝接头 WMS
