新型大容量电钻开关随着采掘机械化程度的提高，采掘设备容量也在不断增大，相应地也需要大容量的电钻开关．煤科院南京研究所近来研制出一种触点容量大：体积小、可靠性高的ＳＫＫＺ型电钻开关。该开关采用原７ＫＫＩ电钻开关的外壳，保持了原开关操作灵活、安装方便、体... New high-capacity drill switch With the increase of mining mechanization, mining equipment capacity is also increasing, correspondingly, also requires large-capacity electric drill switch. Recently, Nanjing Institute of Coal Science Research Institute has developed a SKKZ electric drill switch with large contact capacity, small size and high reliability. The switch uses the original 7KKI drill switch shell, maintaining the original switch flexible operation, easy installation, body ...