单选题
金属及复合管在试验压力下,观察( )min,压力降不大于( )Mpa,然后降到工作压力进行检查,以不渗漏为合格。
A9,0.02
B9.0.05
C10,0.02
D10.0.05
正确答案
答案解析
略
A9,0.02
B9.0.05
C10,0.02
D10.0.05