单项选择题
A.the viscosity index B.the fuel oil contents C.the starting speed D.the reading at the rack
Engine （） refers to the relative time of position of cr...
单项选择题Engine （） refers to the relative time of position of crank, at which each operation during the cycle is commenced and is completed.
A.timing B.power C.firing order D.dead center
A.timing B.deviation C.firing order D.phase
Engage the flywheel with the （）.A.turning gearB.motorC....
单项选择题Engage the flywheel with the （）.
A.turning gear B.motor C.driving gear D.driven gear
