If the rate is at the low end of the range and was lower still before a key pipe on top of the blowout preventer was cut to accommodate the top hat, about half as much oil has been spilled so far.

假如现在这个比率是最低的、并且放在防喷器上方的关键性管道适应了高帽之前、仍然保持低比率，那时候泄漏的油约相当于现在已经漏掉量的一半。

youdao

An enlarged pipe at the top of a casing string that serves as a funnel to guide drilling tools into the top of a well.

套管柱顶部的一根大口径管，形如漏斗，以引导钻井工具进入到井眼的顶部。

youdao

The article introduced the main construction technique of open top pipe construction through a top pipe construction project instance of Kunming.

文章通过昆明市某顶管工程实例，介绍了开敞式顶管施工的主要施工工艺。

youdao

On ABC News, BP managing director Bob Dudley said underwater robots will move in to saw off the top of the broken pipe.

VOA: standard.2010.05.31

The trick now is to machine the top of the pipe so that the remaining 1400 or so feet can be gripped or to use other tactics to grab hold of it and pull it up and out of the hole so that drilling can proceed.

FORBES: Where is McMoran's Missing Press Release?

It was an 83.5-carat diamond and it gave birth to one of the world's most powerful multinationals, De Beers, named for Afrikaner brothers who owned a farm on top of a diamond pipe.

FORBES: Fracture Lines

And you can either stack it on top of each other high, or you can just grow the single pipe vertically, and plants will naturally sprout right out of that.

NPR: Vegetable Gardening On A Budget