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。
By several decades of exploration and practice, the designer has profound acquaintance with stressing mechanism of choke plug that does not rely on shear force to maintain the balance.
经过几十年的探索和实践，设计人员对封堵堵头的受力机理已有了深刻地认识，堵头并不完全是靠基础面的剪摩作用维持平衡。
By several decades of exploration and practice, the designer has profound acquaintance with stressing mechanism of choke plug that does not rely on shear force to maintain the balance.
经过几十年的探索和实践，设计人员对封堵堵头的受力机理已有了深刻地认识，堵头并不完全是靠基础面的剪摩作用维持平衡。
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