We can also adopt sand shell moulding or metal mold casting as for allotype castings.
对异形铸件，还可用砂型铸造或金属型铸造。
This paper introduces the craft characteristics of casting the shell of the gearbox, including the manufacturing of the resin moulding, the application of the hard sand core and so on.
针对变速箱壳体毛坯铸造的工艺特点，介绍了其树脂模具的制造、树脂自硬砂砂芯应用等关键环节的技巧和做法。
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