- floor block
- notch block
- notchblock
- snatch block
- viol block
- 开口: open one's mouth; start to t ...
- 滑车: block; wheel; purchase tackl ...
- 开口滑车开口滑车: notch block
- 木开口滑车: wood snatch block; wooden snatch block
- 铁开口滑车: iron snatch block
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