| 1. | Application on predrainage of seam in hebi no . 8 coal mine
预抽煤体瓦斯在鹤壁八矿的应用 |
| 2. | Pre - evacuation protect atmosphere furnace
预抽真空保护气氛炉 |
| 3. | Application of pdc bit in sihe mine coal seam predrainage drilling
钻头在寺河煤矿瓦斯预抽放钻井中的应用 |
| 4. | Collapse characteristics research on roof rock strata with 3dec in full - mechanized caving mining
焦作矿区煤层瓦斯合理预抽期的研究 |
| 5. | Teat on rational bore - hole parameters of gas pre - drainage by holes along seam in chengzhuang mine
成庄矿顺层钻孔预抽煤层瓦斯的合理钻孔参数试验 |
| 6. | Application of confirmation model for reasonable pre - draining time is introduced in this paper
摘要主要介绍了合理预抽期确定模型在焦作矿区的应用。 |
| 7. | Preliminary application of gas pre - drainage from coal seam by long holes in heading face to prevent coal and gas outburst
掘进工作面应用长钻孔预抽煤层瓦斯防止煤与瓦斯突出的效果 |
| 8. | Effectiveness of outburst - prevention measures of combining gas pre - drainage by highly - located roadway in roof with deep - hole loosening blasting
顶板高位巷预抽与深孔松动爆破相结合防突出措施效果 |
| 9. | The reasonable confirmation of pre - draining time is one of the key factors of gas draining for reducing danger degree of gas bursting
为了减少瓦斯突出的危险性，合理地确定预抽期是瓦斯抽放的关键因素之一。 |
| 10. | For example , vacuum metallurgy , power condensers , transtormers , vacuum macerate process , fore - sucking for vacuum coating equipment , etc
如：真空冶炼，电力电容器，变压器，真空浸渍处理，真空镀膜设备中的预抽等。 |
