Because of the fast cooling of flowing medium, the hydrogen cracking occurs easily under in-service welding.
在役焊接过程中，管内流动介质的快速冷却，易使接头出现氢致裂纹。
2
Low hydrogen electrode to be used for welding thick steel plate to casting and high tensile plates.
应采用低氢焊条焊接厚钢板与铸钢件和高强度板间的连接。
3
Some use of hydrogen is made in the welding and cutting of metals. Hydrogen is also used by semiconductor manufacturers, primarily to form reducing atmospheres.