I bought three spools of thread at the store .

我在这个店里买了三轴线。

How many spools of thread did you use ?

你用了几轴线？

Deepwater tie-ins of rigid lines : horizontal spools or vertical jumpers ?

刚性管线的深水接头:水平绕轴还是垂直跨接管?

It works like a tape , except that there are no moving spools .

这一工作原理就像磁带，只是没有转动轴。

Inspect individual pipe section , prefabricated spools and pipeline items internally during installation and remove any foreign matter before final welding or bolting .

安装期间从内部检查各管道部分、预制短管和管线，最后焊接或螺栓连接之前除去所有异物。