怠速时 meaning in English

at idle

Change traditional shaft structure , adopt unique output constamt mesh structure , only 2 pair ( tradition is 4 pairs ) of gears idle when neutral , reduce the synchronous inertia improve shifting performance greatly , and increase the neulral noise level
一改传统的三轴结构，采用独特的输出减速结构，怠速时仅有2对齿轮空转（传统4对以上），有效降低各档同步惯量，使操作性能大大提高，并有效改善空档噪声。
Fasten bolt to fix distributor . regulate ignition timing , start up engine and make fine regulation to ignition advance angle at the time of idling speed to make engine to be stable while idling . acceleration should be sensitive and powerful which means a complete regulation is done
调点火正时，启动发动机，在怠速时对点火提前角做细微调整，使发动机在怠速阶段平稳，加速时应明显感到快捷有力，即调整完毕，拧紧分电器紧固螺栓。