在坑道曲折的角度下,利用电耙收鑛是有实际重要意义的,因为收鑛工作的过程,一般地都要佔去一個循环班工作時間的30％至50％。 關於在狹窄坑道曲折角度下設置与使用電耙的工作,過去不論是我們和其他外國都創造過許多不同的方法 In the twists and turns of tunnels, it is of practical significance to collect electricity by using electric rakes, because the process of collecting work normally takes up 30% to 50% of the working hours of a circulating class. With regard to the work of setting up and using electric harrows in the context of narrow tunnel twists and turns, many different methods have been created in the past whether we and other foreign countries