A traditional cable driven elevator has mechanical components that can hold the car in place in the event of a power outage.
传统缆绳牵引的电梯带有一些机械零件，在断电时可使电梯停在原地。
A traditional cable driven elevator has mechanical components that can hold the car in place in the event of a power outage.
传统缆绳牵引的电梯带有一些机械零件，在断电时可使电梯停在原地。
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