the position of a crank when it is in line with the connecting rod and not exerting torque
dead center的用法和样例:
例句
用作名词 (n.)
The spark is therefore timed to occur before the piston reaches top dead center, otherwise maximum pressure would not be reached in time. 因而,在活塞到达上死点前,火花便会发生,否则就不可能适时达到最高的压力。