题目
Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to （）decrease the time required between cleanings removes all large and small foreign objects ensure a positive flow of oil at all times ensure that all lube oil has been treated twice
Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to （）decrease the time required between cleanings removes all large and small foreign objects ensure a positive flow of oil at all times ensure that all lube oil has been treated twice
题目解答
答案
C