This paper states that petroleum resin is synthesised by using fractions of C_9, which are the by-product of Daqing ethene unit.
研究了利用大庆乙烯生产装置副产的c_9馏分合成油溶性石油树脂。
The variations of main gas volume fractions with initial oxygen volume fraction during pulverized coal reburning were investigated using a one-dimensional flame furnace.
在一维炉上对煤粉再燃过程中烟气内主要气体体积分数随再燃区初始氧体积分数的变化规律进行了研究。
This experimental result is consistent with the calculated results using the model of soft magnetic phase volume fractions coupled completely suggested in this paper.
这一实验结果与本文提出的完全耦合软磁相体积分数示意模型的计算结果相一致。
A correlation equation developed by the author for calculating the thermal conductivity of petroleum fractions was investigated using the measured data of various petroleum fractions.
作者继开发石油馏分导热系数关联式后，利用国内外中平均沸点和相对密度分布范围很宽的各种石油馏分的大量实验数据，对关联式进行了考察。
The interfacial viscosity of super critical separated Iranian light vacuum residue fractions was investigated by using shear interfacial viscosity meter.
采用剪切界面粘度仪考察了伊朗轻质减压渣油超临界分离馏分的油水界面粘度。
Particle characteristics of model emulsion of vacuum residua fractions from Iranian light and Daqing crude oils were studied by using dynamic light scattering method.
采用动态光散射法研究了伊朗轻质减压渣油和大庆减压渣油模拟乳状液的粒度特征。
He claims that by using a sequence of solvents a series of fractions can be obtained.
他指出，用这样一系列溶剂，可以得到一系列级分。
Dilational viscoelasticity of oil-water interface film formed by vacuum residue fractions from Iranian heavy crude oil was studied by using L-B method.
采用L B法考察了大庆减渣馏分油水界面膜的扩张粘弹性，并和伊朗重质减渣馏分油水界面膜的扩张粘弹性进行了比较。
Various fractions of tannins with different polarities and relatively narrow molecular weight distribution were obtained by extractions using ether and ethyl acetate sequently .
通过乙醚和乙酸乙酯萃取可得到极性不同的组分。分析表明，各级分的分子量分布范围不同，且相对较窄。
The influences of reaction conditions and petroleum fractions on the removal of calcium by dilute aqueous acetic acid were investigated using calcium naphthenate as model compound.
用稀醋酸水溶液作为脱钙剂，环烷酸钙作为模型有机钙化合物，研究了反应条件以及原油三组分的存在对脱钙的影响。
The interfacial viscosity of Daqing vacuum residue fractions was investigated by using shear interfacial viscosity meter.
采用剪切界面粘度仪考察了大庆减压渣油超临界馏分（简称大庆减渣馏分）的油-水界面粘度。
Technologies for propylene production by using C4 and C5 fractions as feedstock coming from steam cracker and refineries are reviewed.
利用蒸汽裂解和炼油工艺的碳四和碳五馏分生产丙烯是增产丙烯的一条重要途径。
At present, there is seldom construction application of the stabilized earth road subbase using low liquid limit silt soil or sandy silt soil with few fine clay fractions.
粘粒含量很少的低液限粉土或含砂低液限粉土做稳定土路面底基层，目前施工实践较少。
At present, there is seldom construction application of the stabilized earth road subbase using low liquid limit silt soil or sandy silt soil with few fine clay fractions.
粘粒含量很少的低液限粉土或含砂低液限粉土做稳定土路面底基层，目前施工实践较少。
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