石油沥青

Asphaltum: Natural mineral compounds consist of carbon, hydrogen, sulphur and nitrogen or the residue from distillation of petroleum, coal tar or rosin.

沥青：天然产生的沥青是含有碳、氢、硫和氮的矿产化合物。人造沥青是蒸溜石油，煤焦油或松脂后的余下渣滓。

The source of the asphalt and the crude oil are homogeneity in some way, but lanthanon fractionation of the asphalt is relatively high. So it can show that the asphalt is higher than the evolution degree of crude oil. Origin has also variety, some samples maybe exert deep fluid.

表现出两者在来源上具有某种程度上的同源性，但沥青的稀土分馏程度较石油大的多，由此表明沥青的演化过程较石油更复杂。

Part of Canada's openness to Chinese investment stems from the sheer cost and complexity of extracting oil from tar sands, which is only profitable when oil prices are high.

加拿大对中国投资的开放部分源于从沥青砂中提取石油的高额成本和复杂技术。只有在石油价格高企的时候，开发沥青砂才是有利可图的。

Samples were collected in lab for civil coal combustion and in field for coke plant and petroleum asphalt, 13 polycyclic aromatic hydrocarbons were determined by GC/MS.

利用模拟实验采集了民用燃煤污染源样品，在现场采集了焦化厂和石油沥青两类污染源样品，用GC MS联用技术测定了样品中 13种多环芳烃。

Expound petroleum asphalt is a non-carcinogen, can Burnout special liquid fuel, it has have obvious economic benefits to alternative diesel fuel and easy managed.

阐明了石油沥青是一种燃烧不产生致疮物质、能燃尽的特殊液体燃料，替代柴油作燃料经济效益明显，且管理方便。

Because it is difficult to distinguish between petroleum asphalt polyurethane waterproofing coating and coal tar PU waterproofing coating which is prohibited by the State,that makes the product market confused.

由于国家禁止使用的煤焦油聚氨酯防水涂料与石油沥青聚氨酯防水涂料较难分辨，使得聚氨酯防水涂料市场较为混乱。

Keywords extra specific surface area;petroleum asphalt fiber;microelectrode;Current respondence;pH respondence.

超大比表面积；石油沥青基碳纤维；微电极；电流响应； pH响应

With a purpose of making comprehensive use of heavy residual oil, condensed polynuclear aromatic resin is prepared using petroleum asphalt as raw material and terephthalyl alcohol as cross-linking agent under the catalysis of concentrated sulfuric acid or p-toluensulfonic acid.

从综合利用重质油出发，以石油沥青为单体，对苯二甲醇为交联剂，在浓硫酸或对甲苯磺酸催化下合成了缩合多环多核芳香烃树脂。

Occupational hazard ; Hygienic standard ; Petroleum asphalt fume

由于石油沥青用途广泛，在生产和使用过程中产生大量烟气，对职业接触人群的健

The paper describes in detail the four factors resulting in the corrosion of buried steel pipeline,that is environment,corrosion control effectiveness,material of pipe steel,and stress of pipeline,presents a total statistics on petroleum asphalt,coal-tar enemal,extruded polyethylene coating,PE tape,FBE,and multiple coating system and the individual percentage of theirs per years during 1990-1995,and points out that the selection of all kinds of coatings,being different behaviors,should be defermined according to the geological conditions and corrosive environments along pipeline route.

阐述了埋地钢质管道发生腐蚀的四个影响因素，即环境、腐蚀防护效果、钢管材质和制造工艺以及应力水平，统计了1990-1995年石油沥青、煤焦油瓷漆、挤塑聚乙烯、PE胶带、FBE、复合覆盖层的涂敷量，指出防腐覆盖层各有优缺点，应根据管道线路的地质条件、腐蚀环境等而定，目前应建立防腐层的综合评价方法以解决防腐覆盖层的设计问题，同时还应对钢管表面处理、现场补口加以重视，在采用高强薄壁钢材时应考虑壁厚要求。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。