我坑广大职工以阶级斗争为纲,坚持党的基本路线,深入开展“工业学大庆”的群众运动,为提高井下有效风量率,完善通风系统,改善井下空气,搞好社会主义安全生产,组织了以老工人为主体的自动风门“三结合”试制小组,于一九七五年试制了采用光电脉冲触发双稳电路控制 In order to raise the effective air volume rate in the underground, improve the ventilation system, improve the air in the underground and improve the safe production of socialism, I hold the broad masses of workers and staff as the key link and uphold the party’s basic line and carry out the mass movement of “Daqing in Industrial Science” In order to old workers as the main door of the “triple combination” trial group, in 1975 trial of the use of optical pulse triggering bistable circuit control