mold clearing jack

例句：

1. 1. This mold clearing jack is very useful in cleaning the molds.
   这个模具清理器在清理模具时非常有用。
2. 2. The mold clearing jack can be used to remove the mold from the casting.
   模具清理器可以用来从铸件中去除模具。
3. 3. The mold clearing jack was invented to help people clean their molds more easily.
   模具清理器被发明出来，帮助人们更容易地清理他们的模具。