plunger leather

例句：

1. 1. The car's engine is made of piston leather.
   这辆车的引擎是用活塞皮制成的。
2. 2.The tool was made from plunger leather.
   这个工具是用活塞皮制成的。
3. 3. The carpenter used plunger leather to repairthe engine.
   木匠用活塞皮来修理发动机。