The safe working load for the assembled cargo gear and the minimum angle to the horizontal for which the gear is designed shall be marked on the（）. ["deck","head of the boom","heel of the boom","mast or king post"]
JIT系统中，看板按使用的功能主要分为（）。 ["生产订货看板、取货看板","生产订货看板、取货看板、信号看板","三角看板、取货看板、临时看板","ANDON板、临时看板"]
If a severe leak develops in the electro-hydraulic steering gear unit is necessary when（） ["Loss of vessel steering","Overheating of the gyrocompass","Jamming of the six-way vale","Jamming of the follow-up device"]
引起变电站出线断路器跳闸的设备故障原因有哪些？
客户关系维护输入证件类型跟客户证件号码可以查询到已维护的客户关系。
变电站配电网出线故障如何处理？
