起重機支腿鎖定裝置作用

dangbuceshigufasheng，tongwangzhituichuizhiyougangdegaoyaruanguanhuoyouguanpoliehuoqiegeshi
，yeyaxitongzhongdeshuangxiangyeyasuonengfengsuozhituifengsuoyougangliangqiangdeyaliyou

，shizhituibusuo或甩出，從而確保起重作業的安全性。