To Research Distortion of Surrounding Rock of Two- roadway and Coal Pillar Size in Grubbing of Two - roadway

英美

释义

- 双巷掘进两巷围岩变形及煤柱留设尺寸研究

把海词放在桌面上，查词最方便

触屏版| 电脑版

©2003 - 2025 海词词典(Dict.cn)

立即下载