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- The structure and composition of petroleum acids isolated from Gudao crude oil were investigated by means of IR and GC/MS. 采用紅外、色質(zhì)聯(lián)用等分析手段對孤島原油中羧酸的分布、結構及組成進(jìn)行了研究。
- The structure and composition of petroleum acids isolated from Gudao crude oil were investigated by means of IR and CC/MS. 摘要采用紅外、色質(zhì)聯(lián)用等分析手段時(shí)孤島原油中羧酸的分布、結構及組成進(jìn)行了研究。
- The raw materials and process in synthesizing petroleum sulfonates and the fine composition of petroleum sulfonatesare introduced. 介紹了合成石油磺酸鹽的原料和工藝以及石油磺酸鹽的精細結構。
- The thesis analyses in depth form foundation of price of petroleum forms, Science defines petroleum production cost, composition of monopoly profits and land rent. 論文深入分析了石油價(jià)格形成的基礎，科學(xué)界定了石油生產(chǎn)成本、壟斷利潤、地租的內涵和構成。 論文指出石油價(jià)格中包含的壟斷利潤是石油壟斷組織憑借其壟斷地位獲取的超過(guò)平均利潤的超額壟斷利潤；
- According to the structural group theory, the chemical composition of petroleum fractions can be classified as structural groups as aromatics, naphthene, olefin and non-hydrocarbon elements etc. 按照結構基團理論，將石油餾分的化學(xué)組成劃分為芳烴、環(huán)烷烴、烯烴和非烴元素等結構基因，其中芳烴和環(huán)烷烴還按照其環(huán)分布劃分為若干個(gè)亞族基因。
- A trademark used for a brand of petroleum jelly. 凡士林用來(lái)作為石油脂的商標
- The chemistry of petroleum and its derivatives. 石油化學(xué)石油及其復合物的化學(xué)
- The composition of the report took two months. 寫(xiě)這份報告花了兩個(gè)月時(shí)間。
- fractional composition of petroleum 石油餾分組成
- The apparatus used in the cracking of petroleum. 裂化設備用于裂化石油的裝置
- After chemical assay, we have known the composition of the ore. 經(jīng)過(guò)化學(xué)分析，我們知道了礦石的構成。
- Place a dab of petroleum jelly on the bulb. 涂少量的凡士林在溫度計上。
- Any new source of energy will be welcome, as there is a shortage of petroleum. 由于石油短缺，任何一種新能源都會(huì )受歡迎。
- Kerosene is a by-product of petroleum refining. 煤油是提煉石油的副產(chǎn)品。
- Fertilizers modify the composition of herbage. 肥料可改變牧草的組成。
- The prices of petroleum products have soared. 石油產(chǎn)品價(jià)格已上升。
- Tin enters into the composition of pewter. 錫是白的成分之一。
- They'll sink a well in search of petroleum. 他們將鉆井找石油。
- B:All plastics are the byproducts of petroleum. 所有塑膠都是石油的副產(chǎn)品。
- The changing composition of the electorate. 有改變的選舉團組織
