The salvage crew built steel platforms under the water.

打捞人员在水下建造钢制平台。

We came out of this on to a grilled steel platform, slick with oil, and went down a steel ladder that was hard to hold on to.

我们从这里出来， 来到一个烤钢平台上， 上面沾满了油， 然后走下了一个很难抓住的钢梯。