underground pipe短语¹⁴⁴⁹⁷²⁺² 基本例句 潜管 This paper mainly introduced the distributing manner date processing method, precision and several innovations of the measuring control network for underground pipe in Xiamen. 本文主要介绍厦门市管线测量控制网的布设方式、数据处理方法、成果精度和布网的创新点。 cnki