Manual mouldmakers make and repair sand moulds using patterns, moulding boxes, sand and hand tools following bench, floor or pit moulding methods;
手动模具制造商使用样模，成型盒，砂及手工具，遵从板凳，地板或坑成型方法，制造和修理砂模；
The cause and rule of warpage in the injection-moulding products was introduced. It listed the guarding measures in mold structure, molding technology and forced patterns against warpage.
介绍了注塑制品翘曲变形的原因及其规律。从模具结构、成型工艺、强制定型等方面，列下了避免翘曲变形的措施。
The cause and rule of warpage in the injection-moulding products was introduced. It listed the guarding measures in mold structure, molding technology and forced patterns against warpage.
介绍了注塑制品翘曲变形的原因及其规律。从模具结构、成型工艺、强制定型等方面，列下了避免翘曲变形的措施。
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