panbreaker是什么意思

用法例句

Effect and Mechanism of Subsoil Fertilization on the Albic Luvisol Improvement;

心土培肥改良白浆土效果及机理的研究

Based on the bad stability property in the soft rock of two-way mountain tunnel in loess area and by means of the three-dimensional finite element method,the effect of the length of step and the length and the width of core soil on the longitudinal displacement of tunnel face,the plastic zone depth behind tunnel face and tunnel plastic area are analyzed.

针对黄土地区山岭双线隧道软弱围岩稳定性较差的问题,通过三维有限元方法系统地分析了台阶长度及核心土长度、宽度对隧道掌子面的纵向位移、塑性区纵向深度和横向大小的影响。

This paper probes into the ringlike drift heading method for multidrop tunnels with preformed core soil, introduces the construction flow sheet, the construction methods and construction control key points, and puts forward some measures for the quality and safety of the construction.

探讨了多线站场隧道预留核心土环形导坑法,介绍了施工流程图、施工方法及施工控制要点,提出了施工质量措施与施工安全措施。

Effect of Subsoil-fertilizing of Lessive Soil;

白浆土心土培肥效果的研究