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。

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。

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）。