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There exists a concern in between Cloudflare's cache plus your origin Internet server. Cloudflare displays for these faults and instantly investigates the induce.检查吊车的机械部件，包括卷筒、齿轮和轴承。寻找任何裂纹、磨损或变形。检查链条或钢丝绳是否存在损坏或磨损迹象。如果出现任何异常