dead center
dead-center的词性:
n.(名词)
1. The point at the end of each stroke of a moving crank and connecting rod at which the two lie in the same straight line and the turning force applied by the connecting rod is zero.Also called dead point
死点,正中:一个可移动的曲柄和连接杆间行程末端的一点,此时两者在同一直线上并且连接样所施加的转力为零也作 dead point