A detailed design requirements through a hole. In the illustration shows the details can be redesigned to achieve the same function as the old by converting into three boundaries holes opposite each other, each envelope is formed on opposite sides of the mold by utility the telescoping shutoff (telescoping shutoff: the metal is grinding against each other in a mold, usually will create holes in the product, and to create the mold drainage angle 3 degrees on the surface of the product concerned).
đang được dịch, vui lòng đợi..