卷juan揚yang機ji的de雙shuang繩sheng提ti升sheng機ji構gou,卷juan揚yang機ji的de卷juan筒tong是shi具ju有you左zuo右you分fen隔ge的de卷juan筒tong,繞rao在zai卷juan筒tong上shang的de鋼gang絲si繩sheng是shi左zuo右you兩liang根gen獨du立li的de鋼gang絲si繩sheng。動dong力li機ji經jing減jian速su機ji構gou後hou,驅qu動dong卷juan筒上的鋼絲繩各自卷起、chaikai。gangsishengdexiantougezitongguoanzhuangzaijingjiashangdedinghualunzu,yougezilianjiedaodiaolongshang。yongbenshiyongxinxingdejuanyangjideshuangshengtishengjigou,gangsishengdefuhexiao,yidanyigengangsishengduanlie,lingyigengangsishengjiangqibaohuzuoyong,bimian*身傷亡、設備毀壞事故。