distance links meaning in Chinese

定距链节

This paper unite surveys works in dong gua shan mines construction under 1 km place researching four key technology in mine s survey , they are construction survey technology in km deep mine , km deep mine s connected survey technology , km deep level survey technology of longer distances link up in many heads opening and basic control survey technology , km mine s extension when the production must go on accurate fixed position survey technology , and all obtained success
本文结合在千米以下冬瓜山铜矿建设时期的测量工作，研究了深部矿山测量四个方面的关键技术，即千米深井施工测量技术、千米深井联系测量技术、千米深井中段多头开拓长距离贯通和基本控制测量技术、千米深井不停产延深精密定位测量技术，并取得了成功的效果。