烘烤铸圈时升温不能过快，从室温升至400℃，升温时间不得低于 ( )A.20min B.60min C.30min D.10min E.2h

admin2020-12-24 57

问题烘烤铸圈时升温不能过快，从室温升至400℃，升温时间不得低于 ( )

选项 A.20min
B.60min
C.30min
D.10min
E.2h

答案B

解析

转载请注明原文地址:https://ti.zuoweng.com/ti/sqWCKKKQ

相关试题推荐

随机试题