ratchet seed metering device 棘轮式排种装置
Wedge locking device and unidirectional ratchet device are mainly used abroad and wedge lock device is mainly applied in China.
国外主要以楔面自锁结构和单向棘齿结构为主，国内主要以楔面自锁结构为主。
Single side safety control, arm locks with tooth type ratchet, multi-safety device, more reliable.
单边控制保险机构，齿轮锁臂装置，多重保险设计，更加安全。
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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