round and hollow plane

例句：

1. 1. The machine is designed to make round and hollow objects.
   这台机器被设计用来制造圆管和空心物体。
2. 2.The engineer used a round and hollow plane to cut the wood.
   工程师使用一个圆管和空心的锯子来切割木头。
3. 3.The hollow plane was used to drill holes in the wooden beams.
   空心的锯子被用来在木梁上钻洞。