In China, steel according to the chemical composition can be divided into( )
选项:
A:roundsteelbarsanddeformedsteelbars;
B:Carbonsteelandordinarylowalloysteel
C:Ⅰ,Ⅱ,Ⅲ,Ⅳ,andno.5steel
D:Threadedandherringbonereinforcement
发布时间:2024-04-16 18:22:31