正确答案: D
has to be preheated
题目:In order to ensure perfect atomization, the fuel oil () before injection.
查看原题 查看所有试题
学习资料的答案和解析:
[单选题]轴系中心线的偏差度反映的是()的程度。
任意两垂直平面上扭转
[单选题]Among the main propulsion units on board the ship with the same capacity, the lightest one is().
gas turbine