four-way connection
型四通接头 SQM
四通管接头 union cross ; cross pipe ; four way pipe fitting ; [机] four-way union
卡套式四通接头体 union cross-body
卡套式四通管接头 union cross-assembly
四通式管接头 Union Cross
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管件类： 弯头、三通、四通、活接头、卜芯、大小头、管帽、堵头、内丝、外丝、翻边、异径管。
Pipe series: Elbow, tee, cross, movable joint, Bu core, reducer, pipe cap, choke plug, inside the wire, outside the wire, turned-over edge, increaser etc.
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