dummy cylinder

例句：

1. 1. The engineer used a dummy cylinder to simulate the real one during testing.
   工程师在测试中使用了一个假圆柱体来模拟真实的。
2. 2. In the construction of the bridge, a dummy cylinder was used as a temporary support.
   在建造桥梁的过程中，一个假圆柱体被用作临时支撑。
3. 3.The dummy cylinder was removed from the machine before it could cause any damage.
   在机器造成任何损害之前，将假圆柱体从机器中取出。