Shenzhen Shi Ding Ding Technology Co., Ltd. established in 2001, since 1998 has the largest, most sophisticated micro-hole equipment and technical capacity.
深圳市鼎鼎科技有限公司成立于2001年，自1998年拥有最具规模，最精密微小孔设备和技术能力。
The paper summarises the operational performance of the interlock System in pit-head equipment at No. 8 shaft of Ping-Ding-Shan Mine Bureau, Henan Province.
本文总结了作者根据河南省平顶山矿务局八矿井口实际情况所设计的一套井口设施联动闭锁系统。
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