进站信号机LXJ驱动电路:turn it back one quarter turn where it is "hele" in the down position

turn it back one quarter turn where it is "hele" in the down position turn one*s back on turn one*s back on PRESS FIRMLY down on the shackle and turn it back one puarter turn back 是什么意思? turn back time 中文歌词 turn the shackle back to the open position pull it up turn it back to the closed position lock the lock as normal if i could turn back back at one中文翻译