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There may be a problem involving Cloudflare's cache and your origin Website server. Cloudflare screens for these faults and quickly investigates the bring about.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。如果出现任何异常情