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- long pillar mining 长柱分段开采
- Also visible, near the bottom of the image, is ten light-year long pillar sometimes dubbed the Fairy of Eagle Nebula. 此外,靠近影像底部有十根长度将近一光年的气柱,它们有时被戏称是老鹰星云的仙女。
- It is a key for a high level pillar mining's success to prevent backfill from being destroyed. 充填体不产生大规模破坏是高阶段矿柱成功回采的关键。
- Study of mine pressure with room- pillar mining in Nantun Coal Mine 南屯煤矿房柱式开采矿山压力研究
- The vaulting chamber was full of long pillars of stone, fat on either end, narrow in the middle; some were as slender as a hair's-breadth, like strands of oozing honey. 这个拱形的房间里,布了高高的石柱,这些石柱,分布在房间两端的,是粗的,分布在房间中间的,是细的;一些石柱,纤细得如同发丝,就象是渗出的蜂蜜的细丝。
- There was a long lag in forwarding mail to us. 转寄给我们的邮件晚了很久才拿到。
- Sill pillared mining has been used in Tongshan Copper Mine where high tonnage of ore has been reserved in the sill pillars. 铜山铜矿采用有底柱采矿法留下的底柱矿石量较大。
- You can keep my book as long as you like. 我的书你要借多久都随你的便。
- Fruit juices ferment if they are kept a long time. 果汁若是放置很久,就会发酵。
- The beggar spun a long yarn about his misfortunes. 那个乞丐编造了一大篇自己如何遭遇不幸的故事。
- How long will our food supplies hold out? 我们的储粮还能维持多久?
- Discussion on ventilation leakage law in gateway of room and pillar mining 关于房柱式开采巷道漏风规律的探讨
- Pillar Mining of Rock Cross - cut with Pseudo - sloping Flexible Shield 伪倾斜柔性掩护支架开采石门煤柱
- It was a long trudge up the hill. 那段上山的路很难走。
- Mr Jones has a long history of heart trouble. 琼斯先生有长期的心脏病史。
- Technical analysis on feasibility of new room and pillar mining method 新型房柱式采煤法可行性技术分析
- Cream cakes are no long a luxury. 奶油蛋糕再也不是奢侈品了。
- It took a long while to do the work. 做这个工作花了许多时间。
- Keywords room and pillar mining,shortwall mining,goaf,mechanization; 房柱式采煤;短壁采煤法;采空区;机械化;
- Between ourselves, that young man's hair is much too long. 就咱俩之间说说,那小伙子的头发实在是太长了。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries