1.
Probe into Large Diameter Direct Drainage Borehole Construction Technology in North China Type Coalmines
华北型煤矿施工大孔径直排孔的工艺探讨
2.
Drilling Construction Technology of Large Diameter Drainage Hole in Wutongzhuang Mine
梧桐庄矿大直径排水孔工程钻探施工技术
3.
Construction Technique for Large Diameter Discharging Tunnel in the Luoxidu Hydropower Plant
溪洛渡水电站大孔径排水孔施工技术
4.
Discussion on Revamping of The Large Diameter Piercing Head of 10MN Vertical Piercing Mill
10MN立式穿(扩)孔机大直径扩孔头的改造
5.
The plate has holes of approximately 2 in. in diameter on 7-to 8-in. centers in staggered rows.
板上有直径近2英寸的孔眼，交错横排，孔眼中心距为7-8英寸。
6.
The diameter of the objective of a telescope.
孔径望远镜物镜的直径
7.
LARGE-DIAMETER LONGHOLE STOPING METHOD IN SPAIN
西班牙大直径深孔采矿方法考察概况
8.
Stage 3: >=400 microns in diameter, pseudooperculum.
直径大于400微米（裂孔），假性包盖。
9.
Research on the Bearing Performance of the Super-Long and Large-Diameter Bored Pile;
超长大直径钻孔灌注桩承载性能研究
10.
EXPERIMENTAL RESEARCH ON NEGATIVE SKIN FRICTION OF LARGE-DIAMETER BORED PILES
大直径钻孔灌注桩负摩阻力试验研究
11.
Technology of 1000 meter directional borehole at large diameter for mine gas extraction
顶板大直径千米长钻孔抽采瓦斯技术
12.
Gas drainage in seam with large auto variable diameter bore holes
自动变径大直径钻孔抽放煤层瓦斯试验
13.
large core high numerical aperture fiber
大芯径大数值孔径光纤
14.
Type selection of ф3.40m large diameter and deep hole drilling equipment for No 3 main tower pier of Wuhan Tianxingzhou great Yantze River bridge;
武汉天兴洲长江大桥3号主塔墩ф3.40m大直径深孔钻孔设备选型
15.
Blasthole deflection is an severe adverse factor when mining is carried out using large diameter long hole blasting .
在大直径深孔采矿中 ,炮孔偏斜是非常不利的因素。
16.
Analyses on the Hole Wall Stability of Colossal Piles and Research on the Technologies of Drill Hole
大直径深长桩施工孔壁稳定性分析与成孔技术研究
17.
A Developing Conceive for Bundling Pneumatic DTH Hammer of Large-diameter Cast-in place Bored Pile
发展大直径钻孔灌注桩捆绑式气动潜孔锤的一种设想
18.
Test method for pore diameter of porous ceramic
GB/T1967-1996多孔陶瓷孔道直径试验方法