环状网流量分配后即可得出各管段的计算流量,由此流量可进行()。
a、流量计算
b、总量估算
c、流量分配
d、管径确定
参考答案:D
By regulation, cargo tanks must be inert before and during what operation?().
A.Stripping
B.Loading
C.Cleaning
D.Crude oil washing