shell mould machine

例句：

1. 1. The shell mould machineis used to make shells for thepetroleum industry.
   壳模机用于石油工业制造贝壳。
2. 2. The shell mould machine can quickly produce a large numberof shells in a short time.
   壳模机可以在短时间内快速生产大量的贝壳。
3. 3.The shell mould machine is animportant tool for the production of shell products.
   壳模机是生产贝壳产品的重要工具。