钢丝绳在卷筒上至少要保留两圈常清山（齐齐哈尔市房屋安全鉴定站）随着现代生产的飞速发展，起重机械在搬运物料中，越来越显示出它的威力，替代了笨重的体力劳动，提高了工作效率。但在使用过程中，起重机械也极易发生事故。据统计，此类事故不仅年年居各种机械事故之首... Wire rope at least two laps on the reel to keep Changqingshan (Qiqihar City Housing Safety Appraisal Station) With the rapid development of modern production, lifting machinery in the handling of materials, more and more shows its power to replace bulky physical Work, improve work efficiency. However, the use of cranes is also prone to accidents. According to statistics, such accidents not only occupy the first place in all kinds of mechanical accidents ...