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橋式起重機，是一種類xingdeqizhongjizaigongyehuanjingzhong。gaojiaqizhongjiyoupingxingdepaodaozucheng，xingjinqiaohengkuagaijianxi。yigehulu，qizhongjideqizhongbujian，yanzheqiaoxingshi。ruguoqiaozaidimianshanggudingzaigudingdaoguishangdelianggehuoduogezhituishangshoudaogangxingzhicheng，zegaiqizhongjichengwei龍門起重機或巨人起重機。
橋qiao式shi起qi重zhong機ji通tong常chang用yong於yu精jing煉lian鋼gang和he其qi他ta金jin屬shu，例li如ru銅tong和he鋁lv。在zai製zhi造zao過guo程cheng的de每mei個ge步bu驟zhou中zhong，直zhi到dao金jin屬shu作zuo為wei成cheng品pin離li開kai工gong廠chang為wei止zhi，都dou由you橋qiao式shi起qi重zhong機ji來lai搬ban運yun金jin屬shu。用yong起qi重zhong機ji將jiang原yuan材cai料liao倒dao入ru熔rong爐lu中zhong，然ran後hou將jiang鐵tie水shui軋zha至zhi特te定ding厚hou度du並bing進jin行xing回hui火huo或huo退tui火huo，然ran後hou由you橋qiao式shi起qi重zhong機ji進jin行xing冷leng卻que以yi進jin行xing存cun儲chu，將jiang成cheng品pin卷juan材cai通tong過guo橋qiao式shi起qi重zhong機ji提ti升sheng並bing裝zhuang載zai到dao卡ka車che和he火huo車che上shang，製zhi造zao商shang或huo壓ya模mo在zai其qi工gong廠chang中zhong使shi用yong橋qiao式shi起qi重zhong機ji來lai搬ban運yun鋼gang材cai。在zai汽qi車che行xing業ye使shi用yong高gao架jia起qi重zhong機ji來lai處chu理li原yuan料liao。較jiao小xiao的de工gong作zuo站zhan起qi重zhong機ji，如ru動dong臂bi起qi重zhong機ji和he龍long門men起qi重zhong機ji，處chu理li在zai工gong作zuo區qu輕qing負fu載zai，如ruCNC機或鋸。
jihusuoyouzaozhichangdoushiyongqiaoshiqizhongjijinxingdingqiweihu，xuyaochaichuzhongxingyazhagunheqitashebei。qiaoshiqizhongjiyongyuzaozhijidechushigouzao，yinweitamenshianzhuangzhongxingzhutiezhizhiganzaoguheqitadaxingshebei（某些重達70噸）更加容易。