Because the pipes are steel, most of the ions are iron.
因为管道是钢制的，大多数溶解下来的离子属于铁离子。
Our company can provide various steel grade and specification ERW oil pipes.
我公司提供不同钢级、多种规格的ERW石油钢管。
He did not say if all those steel pipes had been examined.
他并没有说那些钢管是否都检验过。
He did not say if all those steel pipes had been examined.
他并没有说那些钢管都检验过没有。
Overhead, the steel-framed ceiling is covered in a network of pipes.
顶部的钢结构天花板则被铺设的网管装饰起来。
He did not say if all those steel pipes had been examined.
他并没有说那些钢管全部检验过没有。
The stainless steel condenser of our factory is of the straight-pipes type as shown below.
我厂生产的列管式换热器（见下图）。 主体设备均采用优质材料制成。
The stainless steel condenser of our factory is of the straight-pipes type as shown below.
我厂生产的列管式换热器（见下图）。 主体设备均采用优质材料制成。
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