when the operation staff start up the machine, they should watch the lifting rope is in good order or not, the rope amount left on the roller can't less than 3 rings.
操作者开机时,应随时观察提升卷扬机卷筒排绳是否整齐,卷筒上的余绳量不得小于3圈。
the study has been conducted on the additional dynamic load of lifting rope due to wave-induced motion of the pipe laying and lifting barge 「lanjiang」.