casting shovel

例句：

1. 1. The engineer used a casting shovel to dig the foundation for the new building.
   工程师使用投石器为新建筑挖掘地基。
2. 2. The construction workers used casting shovels to break up the concrete.
   建筑工人使用投石器将混凝土打碎。
3. 3. The soldiers used casting shovels to clear a path through the snow.
   士兵们使用投石器在雪中开辟道路。