Pawl is a simple device which allows a shaft to turn only one way.
掣爪是一种非常简单的只让转轴往一个方向转动的装置。
Disclosed is a pressure dredging device without a rod, mainly comprising a draft tube, a connecting tube, a handle, a compressing ring and a regulating pawl.
一种无杆压力疏通器，主要包括有引管、连管、手柄、压缩圈以及调节爪。
The block device in the invention can adopt one-way pawl-ratchet type on-off devices and one-way roller overrunning clutches.
本发明中的止回装置既可采用单向棘 爪棘齿式离合装置，也可以采用单向滚柱超越离合器。
The block device in the invention can adopt one-way pawl-ratchet type on-off devices and one-way roller overrunning clutches.
本发明中的止回装置既可采用单向棘 爪棘齿式离合装置，也可以采用单向滚柱超越离合器。
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