粘闭土
hang off line for travelling block
游车悬吊绳
i don't think it will be difficult for you to do the maintenance work for this travelling block, for its construction is quite simple.
我以为你要维修这个游动滑车并不难,因为它的构造非常简单。
the derrickman lubricated crown and travelling block yesterday.
昨天这个架工保养了天车和游动滑车。
The travelling block is one of the most useful rig parts.
游动滑车是最有用的钻机部件之一.
When hoisting any large or heavy equipment off the catwalk always check the Working Load Limit ( WLL) of the air winch, or use the travelling block or crane if available.
当从猫道上提升体积大或较重的设备时,要检查气动绞车的额定工作负荷,或使用游车或吊车(如果有)。
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