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内货从勾里正往下撒落，里面肯定有破袋。
The contents are dropping from the sling. There must be some torn bags inside.
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肌肉拉 勾为曲状双头结构，其两端部的撑开器为内凹的曲面板状。
The muscle pulling hook is curved double-head structure, and the expanders for the two end parts are concave curved plates.
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