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1)  internal crawl space
内爬距
2)  creepage distance
爬距
1.
The results of analysis on pollution flashover accidents occurred in 500kV transmission lines of East China Power Grid show that insufficient creepage distance and irrational shed profiles of insulators are the principal reasons to cause pollution flashover of transmission lines.
对华东电网500kV线路发生的污闪事故分析表明,爬距不足和绝缘子伞型不合理是造成线路污闪的最主要原因。
2.
Contamination accumulation characteristics and creepage distance utilization coefficients greatly impact the external insulation characteristics, so these factors should be considered in external insulation configuration.
绝缘子的积污特性和爬距有效利用系数对线路的外绝缘特性有重要的影响,这一点应在外绝缘配置时予以考虑。
3)  creepage distance
爬电距离
1.
Determination of the minimum clearance and minimum creepage distance for electronic equipment in safety examinations;
电子产品检测中电气间隙和爬电距离的确定
2.
The determination method of electrical clearance and creepage distance is expounded, and the testing and demonstration method is described.
阐述了电气间隙和爬电距离的确定方法,并介绍了试验验证方法。
3.
Calculation and numerical analysis from programming educesaccurate measurement of creepage distance in complicated structure, thereby strengthening the proficiency test ability.
爬电距离是安全试验和国内外水平测试的重要项目。
4)  large creepage path
大爬距
1.
1It is pointed out in consideration on service requirement that the key technology for insulator application at UHV system is anti-pollution solution and development and innovation of insulators of high strength classes and large creepage path.
根据1000kV交流输电线路对绝缘子的技术要求,对我国现有的瓷、玻璃盘形悬式绝缘子和棒形悬式复合绝缘子的等级规格、电气特性和机械特性进行了分析;结合运行的要求指出特高压系统用的绝缘子应解决的关键技术是污秽问题,同时要完善和开发高吨位等级的各种大爬距的绝缘子;特高压绝缘子串的电位分布对绝缘子的性能影响应引起重视;除了执行GB/T1001-2003和GB/T19519,还应增加补充打击负荷试验(仅是普通型)、可见电晕电压试验、无线电干扰试验、工频电弧试验、机械振动试验和长串机械试验。
5)  creeping-in distance
爬行距离
1.
A prediction model of the creeping-in distance in the operation of elevator based on Radial Basis Function(RBF) neural network is proposed.
针对电梯运行过程中存在爬行距离的问题,提出了基于RBF(Radial Basis Function)神经网络的爬行距离预测模型。
6)  specific leakage distance
爬电比距
1.
On the basis of the insulation operation experiences and present status of ±500 kV DC overhead lines at home and abroad,and the latest ±800 kV insulators\' withstand voltage test results,we combined a specific leakage distance method and pollution withstand voltage method to get basic insulation selections in ±800 kV line.
因此根据国内外±500kV直流架空输电线路的绝缘运行经验和调爬情况及最新的±800kV绝缘子污耐压试验成果,采用爬电比距法和污耐压法相结合,得出了±800kV线路的基本绝缘配置,探讨了海拔高度和绝缘子覆冰对绝缘选择的影响,并对绝缘子串"老化"作了量的预测。
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。
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