The ductile to brittle transition temperature (DBTT) of the modified 9Cr-lMo steel and its laser welds was studied. The increase in grain size of the weld stru
[中图分类号] TM76 [文献标志码]A [文章编号]2095-6487 (2021) 02-0005-02 Research on Energy-saving Control Method Based on Electrical Automation System of Power Plant Equipment Clu Peng [ Abstract] Elecrrical au