A.72% B.76% C.80% D.85%
A.22~46 B.32~46 C.22~68 D.32~68
A.把設(shè)備.管道里的水帶走 B.把設(shè)備.管道里的雜質(zhì)帶走 C.對設(shè)備.管道進(jìn)行清洗 D.對油品升溫