【简答题】根据石墨形态,铸铁可分为()、( ) 、() 和( )
【单选题】奥氏体不锈钢熔化极氩弧焊一般采用( )富氩混合气体保护.
【单选题】Queations 1 and 2 are based on the news report you have just heard.
A.
It crawled over the woman's hands.
B.
It wound up on the steering wheel.
C.
It was killed by the police on the spot.
D.
It was covered with large scales.
【单选题】奥氏体不锈钢熔化极氩弧焊一般采用()富氩混合气体保护。
【单选题】Queations 1 and 2 are based on the news report you have just heard.
【单选题】根据石墨形态的不同,铸铁可分为灰铸铁、()、球墨铸铁和蠕墨铸铁四种。
【简答题】根据石墨形态不同,灰口铸铁可分为 、 、 、 。
【多选题】铸铁根据石墨的形态,铸铁可分为( )、( )、( )和可锻铸铁。