In this system, the heavy fraction of petroleum has corrosion resistance for steel.
在该体系中石油重馏份对钢有缓蚀作用。
There are few studies on the effect of crop root systems on the composition, particularly on the heavy fraction of soil humus.
本文对黑钙土、黑土中各种作物根茬留茬与否对土壤腐殖质、土壤重组有机质的组成、结合形态及某些光学性质进行了测定。
And the above heavy fraction base oils were applied to the formulation of engine oils and a series of blending projects were obtained.
并将以上重组分基础油在内燃机油配方中进行了应用，得到了相关内燃机油产品的调合方案。
Technology Progress of producing BTX aromatics from heavy fraction of pyrolysis gasoline and correlative hydrodealkylation and non-aromatics hydrocracking techniques were reviewed in this paper.
综述了裂解汽油重质馏分增产BT X芳烃的技术进展以及与此相关的加氢脱烷基和非芳烃加氢裂解技术。
The results showed that the contents of organic matters in soil and heavy fraction were markedly increased and the agrochemical properties of Chernozem were improved by applying organic materials.
结果表明：用有机物料培肥土壤时，可以提高土壤有机质和重组有机质的含量，改善土壤的农化性质。
But a small fraction of drives will fail in any given year, especially under the heavy, continuous use typical of data centres.
然而在设定使用的年限内，还是有一小部分硬盘会损坏，特别是在典型的数据中心繁重的，持续的使用过程中更是如此。
Considering the high contents of olefins and nitrogen, the whole fraction of delayed coker distillates (including light and heavy naphtha, gas oil) must be hydrotreated.
延迟焦化馏出油(包括汽油、柴油及蜡油)的烯烃含量和氮含量高，必须进行加氢精制。
The paper also points out, the ideal technology of petroleum naphthalene production is preparing 2,6 DMN from diesel fraction, a product of heavy oil contact cracking.
指出从重油接触裂解柴油馏分中制备2 ，6 -二甲基萘是石油萘生产的最理想的技术方向。
Steam thermal drive oil is the method in which high pressure steam with suitable dryness fraction is injected into heavy oil stratum.
注蒸汽稠油热采是指稠油开采时向稠油层注入适当干度的高压蒸汽进行原油采集。
With the riser height increases, the mass fraction of heavy oil reduces, while the weight of gasoline, LPG, gas and coke has been increasing.
随着提升管高度的增加，重油的质量分率降低，而汽油、液化气、气体和焦炭的产率增加。
The growth trend and current application of heavy pyrolysis gasoline fraction was introduced generally.
分的增长趋势以及目前应用作了概括性的介绍。
The finite element method (FEM) model was established to predict the temperature field, shell growth and solid fraction of the heavy rail bloom caster.
采用有限元方法，对某钢厂的重轨钢大方坯连铸机的凝固过程温度场分布情况、坯壳生长规律和凝固率进行了模拟研究。
The finite element method (FEM) model was established to predict the temperature field, shell growth and solid fraction of the heavy rail bloom caster.
采用有限元方法，对某钢厂的重轨钢大方坯连铸机的凝固过程温度场分布情况、坯壳生长规律和凝固率进行了模拟研究。
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