breeches buoy
柯林斯词典
1. N a ring-shaped life buoy with a support in the form of a pair of short breeches, in which a person is suspended for safe transfer from a ship 褲形救生圈
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1. N a ring-shaped life buoy with a support in the form of a pair of short breeches, in which a person is suspended for safe transfer from a ship 褲形救生圈