用20Cr造句子，“20Cr”造句
来源：国语帮 2.63W
Solid-Phase Reaction and Microstructure of Interface of 3D Meshy SiC_n/20Cr Steel Composite
Surface combined treatment of carbonitriding and B-C-N-RE multi-elements deep-penetrating on 20Cr steel firebrick die
Preliminary Investigation on Austenitic Nitriding and Intermediate Temperature Tempering for 20Cr Steel
Study on Optimizing the Tecnics of the Super Saturation Carburization on 20Cr Steel and a New Stype Super Saturation Carberization Steel;
Cyclic Oxidation Behavior of Ni-20Cr Alloy Prepared by Mechanical Alloying
