The utility model is provided with the rolling push rod of a back stop device with low cost, and has the advantages of big moment, simple structure and reliable operation.
本实用新型具有低成本逆止装置的滚动推杆，且力矩大、结构简单、工作可靠。
The utility model is provided with the rolling push rod of a back stop device with low cost, and has the advantages of big moment, simple structure and reliable operation.
本实用新型具有低成本逆止装置的滚动推杆，且力矩大、结构简单、工作可靠。
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