Maintenance ; instructions for maintenance 维护.维护说明书
2.
Maintenance for lifts and escalators - rules for maintenance instructions ; german version en 13015 : 2001 升降机和电梯维护.维护说明书规则
3.
Please operate and maintain the hoist in accordance with the : " peration & maintenance manual of nhss wire rope pulling hoist " 请按照" nhss型钢丝绳手扳葫芦使用维护说明书"使用维护。