mechanical handling

例句：

1. 1. The machine is designed to perform heavy lifting tasks.
   这台机器设计用来执行重物搬运任务。
2. 2.Mechanical engineers are responsible for designing and building machines.
   机械工程师负责设计和建造机器。
3. 3.The car's engine is mechanical, meaning it uses a piston to move the wheels.
   汽车的引擎是机械的，意味着它使用活塞来推动车轮。