电弧螺柱焊用螺柱 - PD型,半牙螺柱 Stud for Arc Stud Welding - Partially Threaded Stud - Type PD
PD型电弧焊用焊接螺柱 Threaded Studs for Drawn Arc Stud Welding with Ceramic Ferrule - PD Style
机动弧用焊接螺柱 Weld Studs for Arc Welding
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