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词汇 small coal
释义 small coal短语¹⁴⁴⁹⁷²⁺²
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It has intensified efforts in the control and comprehensive utilization of coal gas, and rectified and shut down small coal mines lacking conditions for safe production.
加强对煤气的控制和全面利用,调整和关闭缺乏安全生产环境的煤矿。 blog.sina.com.cn

From the angle of enterprise ethics, the paper analyzes the morals and ethics of the safe production problems of medium and small coal- mine enterprises, through definitions of enterprise ethics .
本文从企业伦理的角度,对中小煤矿企业的生产安全问题进行了具有企业道德伦理取向的分析。 dictall

This paper introduced methods to select tunnel position and maintain measures for the tunnel in small coal pillar.
文章介绍了在煤柱中确定巷道位置的方法及巷道的维修措施。 chemyq
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