The mold has a specific contour or cavity shape, and the contour shape with a cutting edge can be used to separate the blank according to the contour shape (punching).
Malleable iron extensions pieces can be Black , Hot dipped galvanized or cool ( Electric )galvanized . According to the main Materials is divided into Galvanized malleable Union , Stainless steel Union, Ductile iron Union and lining plastic Union .
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