保护气系统:从保护气体发生站至还原退火炉的管道。
The improvement seal was composed of combination of stuffing seal and labyrinth seal and protective gas was used.对填料密封设计进行改进,采用填料与迷宫组合密封结构,加气体保护密封方案。
Using the argon gas as protective gas, the content of Sr in alloy was more than that of alloy made by the flux method.用氩气保护,制备出的合金中锶实际含量高于熔剂法制备的合金。