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针对某厂超期服役的20T×28M型桥式起重机,制定安全性能检测方案,经过检测,确定该起重机主要梁架已产生永久变形,建议报废并随即采取安全对策。
For a 20T × 28M overhead crane in service overdue at a certain factory, the safety performance testing scheme is formulated. After testing, it is determined that the main girder of the crane has been permanently deformed. It is suggested to scrap and take safety measures immediately.