The expansion joint comprises a corrugated pipe, the cross section of which is rectangular.
本实用新型 包括波纹管，所述的波纹管的横截面为矩形。
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.
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。
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