非开挖反向回拉扩孔施工过程中时常出现钻杆正转而发生退扣，造成钻具孔内脱落事故的反常现象。
The dropping buckle usually occurs when reverse pulling is used for expanding the bore in the trenchless construction, thus causing the fall-off of the drilling tools.
分析了正循环回转钻深孔施工的施工方法和要点，提出了施工监理的监理质量控制点及注意事项。
The measures to control construction quality are analyzed, which are used to drill deep holes with normal circulation slewing drilling machine.
方法利用正相、反相硅胶柱和大孔树脂柱色谱分离，并通过波谱技术进行结构鉴定。
Methods The compounds were isolated by silica gel, ODS, and macroporous resin column chromatography and their structures were determined by means of spectral analysis.
《韩诗外传》断章取义的解诗模式是先秦儒家孔、孟、荀通经致用、弘扬诗教的正脉。
The explanatory pattern of Hanshiwaizhuan comes from Confucius as the primary means of Poetry teaching.
我们当中有些人正站在自己的卢比孔河边，仍然不肯认真考虑委身给基督。
Some of us are standing beside our own Rubicon and are still toying with making a commitment to Christ.
一种正牙孔圈(12)包括配置成用于耦合至正牙植入物(16)上的接合部分(20)。
An orthodontic eyelet (12) includes an engaging portion (20) configured for coupling onto an orthodontic implant (16).
在第二构造中，正牙孔圈(12)允许耦合至正牙矫正设备(14)。
In the second configuration the orthodontic eyelet (12) permits coupling to an orthodontic corrective device (14).
该第二构造可以使其阻碍正牙孔圈(12)相对于正牙植入物(16)的旋转。
The second configuration may be such that it hinders rotation of the orthodontic eyelet (12) relative to the orthodontic implant (16).
在该方面，第一形状和第二形状配合以使正牙孔圈(12)和正牙植入物(16)彼此锁定接合。
In this regard, the first shape may cooperate with the second shape to move the orthodontic eyelet (12) and the orthodontic implant (16) into locking engagement with one another.
基于该优化设计并结合试验得到了适合正流群孔电解加工的分流均匀度系数和相应的尺寸系数。
Based on the optimization, experiments are conducted to obtain the uniformity ratio and the corresponding dimension ratio which suit the multiple hole drilling process.
其扭力段由正四棱柱形改为正六棱柱形的，这样可以与有正内六角孔的风动扳手相插配使用，有提高工效的特点。
Therefore, the overthread screw tap can be matched with a pneumatic wrench having regular hexagonal holes via insertion, and the overthread screw tap has the advantage of high work efficiency.
正硅酸甲酯和硅酸钠形成有序的二维六方相的介孔结构，而正硅酸乙酯形成了囊泡结构。
TMOS and sodium silicate led to iron-containing silicas with ordered two-dimensional hexagonal mesoporous structure, and vesicle mesostructure was obtained using TEOS as silica precursor.
孔阵的排列方式对冷却效果有一定的影响，长菱形分布优于正菱形分布；
The array way of the holes has a certain effect on the cooling efficiency, i. e. long diamond distribution is better than the regular diamond distribution.
其中液相色谱反相填料，正相填料，生物工程用大孔硅胶，样品预处理净化富集柱以及微孔滤膜、滤器均已达到国际先进水平。
The liquid chromatography Silica and bonded silica gel, macro-porous silica gel for bio-engineering, SPE column and microprobe filters has reached advanced world standard.
其中液相色谱反相填料，正相填料，生物工程用大孔硅胶，样品预处理净化富集柱以及微孔滤膜、滤器均已达到国际先进水平。
The liquid chromatography Silica and bonded silica gel, macro-porous silica gel for bio-engineering, SPE column and microprobe filters has reached advanced world standard.
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