midlethal dose

Vocational Guide in Secondary Vocational School;

中等职业学校职业指导刍议

For medium-thick and moderately stable ore- body,being laid preliminary projects in ore block footwall,with medium-longth hole blast,ideal effect was ob- tained in the recovery,reference value was also provided for moderately stable pil.

使用中深孔爆破法进行回收,取得了理想效果,也为顶板中等稳固的同类矿山提供了参考价值。

This paper summarizes five types of treat technologies of natural gas and refinery fuel gas with medium-size sulphur throughputs.

综述了中等潜硫量的天然气和炼厂气的五种净化处理技术:胺法/克劳斯/尾气处理;铁基液相氧化还原;胺法/液相氧化还原;微生物法;结晶硫技术。