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1·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。

2·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。

3·The surface quality of the moulding shell is the key factor influencing the surface quality of precision castings.

影响精铸件表面质量的关键因素是型壳表面的质量。

4·The invention discloses a method for decorating a television shell, comprising the following steps: preparing various kinds of injection moulding parts;

本发明公开了一种电视机外壳的装饰方法，其步骤如下：制作各类注塑件；