hoisting mechanism of furnace roof

例句：

1. 1. The hoisting mechanismof the crane is designed to liftheavy loads.
   起重机的提升机制设计用来吊起重物。
2. 2. The hoisting mechanismof the elevator is crucial for its smoothoperation.
   电梯的提升机制对于其平稳运行至关重要。
3. 3. The hoisting mechanism of thecrane was tested before the construction began.
   起重机的提升机制在施工开始前进行了测试。