a hanger shaft is arranged between a travel wheel of the jackstay machine and a supporting wheel system so as to lead the travel wheel to be hinged with the supporting wheel system.
支索器走行轮和支轮系间增设吊轴,使走行轮和支轮系。
a hanger shaft is arranged between a travel wheel of the jackstay machine and a supporting wheel system so as to lead the travel wheel to be hinged with the supporting wheel system.
支索器走行轮和支轮系间增设吊轴,使走行轮和支轮系。
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