Elevator awọn ẹya ẹrọ OTIS isunki kẹkẹ
Apejuwe kukuru:
Awọn ẹya ẹrọ elevator Traction ati pulley
Awọn ẹya ẹrọ elevator
Isunki ati pulley
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Awọn ẹya ẹrọ elevator Traction ati pulley
Awọn ẹya ẹrọ elevator
Isunki ati pulley