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1)  large angle esotropia
大度数内斜
1.
· AIM: To evaluate the effect of large recession of binocalar medial rectus in treating large angle esotropia of infants.
目的:探讨双眼内直肌超常量后退治疗婴幼儿大度数内斜的效果。
2)  exotropia of large deviations
大度数外斜视
3)  high-angle well
大斜度井
1.
Study on wellbore stability during high-angle well drilling in salt rock;
盐岩层钻大斜度井的井壁稳定性研究
2.
Casing wear is one of the inevitable problems during the drilling process, especially more serious in deep wells, ultra-deep wells, high-angle wells, and extended-reach wells, etc.
深井、超深井、大斜度井、大位移井等高难度井逐渐普及,其钻柱工作时间的延长以及井眼轨迹的变化使得套管磨损问题日益突出,而磨损位置的不同会对套管强度降低的程度产生重要影响。
4)  highly-deviated well
大斜度井
1.
A study on side-bed correction of induction log data in highly-deviated wells;
大斜度井感应测井资料围岩校正方法研究
2.
Numerical simulation of drilling fluid invasion and electrical logging measurements in highly-deviated wells.;
大斜度井钻井液侵入储层电测井模拟算法研究
3.
An analysis of abnormal LWD curve shapes in highly-deviated wells and horizontal wells and its application in stratigraphic division
大斜度井和水平井随钻测井曲线形态异常分析及在地层划分中的应用
5)  high angle deviated well
大斜度井
1.
Cuttings bed thickness analysis of high angle deviated well and horizontal well in Jidong Oilfield;
冀东油田大斜度井及水平井岩屑床厚度分析
2.
Due to the formation of water tank and the existence of micro-clearance of high angle deviated well and horizontal well after cementing, it provides convenience for the breakthrough of oil, gas and water.
大斜度井及水平井固井后水槽的形成及微间隙的存在,为油、气、水窜流提供了通道,针对大斜度及水平井固井的特殊性,研制出一套适合大斜度井及水平井固井的整体质量及稳定性好的膨胀型零游离水水泥浆体系,以弥补环形空间封固质量较差的问题。
3.
Hole trajectory control techniques and safety drilling measures of high angle deviated wells in this block were analyzed and summed.
介绍了临盘地区曲104块20多口大斜度井钻井施工情况。
6)  highly deviated pump
大斜度泵
补充资料:-戊内酯、3-甲基丁内酯、咖吗-戊内酯
CAS: 108-29-2
分子式: C5H8O2
分子质量: 100.12
沸点: 207-208℃
熔点: -31-208℃

中文名称: 4-戊内酯、γ-戊内酯、3-甲基丁内酯、咖吗-戊内酯

英文名称: dihydro-5-methyl-2(3H)-Furanone、dihydro-5-methyl-2(3h)-furanon、4-hydroxypentanoic acid lactone、4-hydroxyvaleric acid lactone、4-methyl-gamma-butyrolactone、gamma-methyl-gamma-butyrolactone、gamma-valerolakton

性质描述: 无色至微黄色液体。凝固点-31℃,沸点205-206.5℃,83-84℃(1.73kPa),相对密度(25/25℃)1.0578,折光率(nD25)1.4301。能与水、许多有机溶剂、树脂和蜡等混溶。10%水溶液的pH为4.2。

生产方法: 由不饱和羧酸通过闭环反应来合成,例如乙酰乙酸与硫酸共热,或乙酰丙酸在镍、铜等催化剂存在下加氢。

用途: γ-戊内酯有较强的反应能力,可用作树脂溶剂及各种有关化合物的中间体。也用作润滑剂、增塑剂、非离子型表面活性剂的胶凝剂、加铅汽油的内酯类添加剂,用于纤维素酯和合成纤维的染色。γ-戊内酯具有香兰素和椰子香味。我国GB2760-86规定为允许使用的食用香料。主要用以配制桃、椰子、香草等型香精。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条