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1.起重量限製器
主要是用於橋架型起重機上，用來限製起重量，當載荷超過額定起重量時，使起重機停止向上起升，隻能向下達到安全保護作用。
2.力矩限製器
lijuxianzhiqifenweidongbibianfulijuxianzhiqihexiaochebianfulijuxianzhiqi。duiyuliudongshiqizhongjiyibancaiyongdongbijinxingbianfude，changcaiyonglijuxianzhiqijinxingchaozaibaohu。duiyuliyongxiaochejinxingbianfudetashiqizhongji，yibanshiyongqizhongliangxianzhiqihelijuxianzhiqilaigongtongshishichaozaibaohu。