Don't about me. I'm OK. [ ]
A. sorry
B. carry
C. worry
C
※ [14~15] . ( 4)
D型泵检修叶轮时,要求做静平衡试验,当叶轮外径为210-300mm时允差极限值为()。
A.3g
B.5g
C.10g
D.15g