The introduction of the concept of bellows wall thickness accuracy has the universal significance and reference value for manufacturing technology of other thin wall tube like products.
提出的管坯壁厚精度概念极其控制方法具有普遍性，对于其它薄壁筒形件的制造工艺具有参考作用。
2
Under the heavy duty operation, the internal coking of tube caused by local tube over heating is an universal problems for delayed coking furnace.
高负荷运行下的焦化加热炉，由于局部炉管过热引起管内结焦是一个普遍性的问题。
3
The corrosion of RH submerged tube is a current universal problem for RH desulfurization process, and understanding the corrosion mechanism is the basic premise to alleviate and avoid the corrosion.