机;
闩;
，
;The stone was lifted by means of a rope and pulley.
这块大石是用
子和滑轮给吊起来的。
动机皮带轮The stone was lifted by means of a rope and pulley.
这块大石是用子和滑轮给吊起来的。
The stone was lifted by means of a rope and pulley.
这块大石是用子和滑轮给吊起来的。
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现问题，欢迎向我们指正。
