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原油的安全措施和事故应急处置 | 2012-6-7 8:46:00
Re:水泵超高压试验安全操作 | 2012-6-7 8:48:11
章仁根原油即石油,是一种粘稠的、深褐色(有时有点绿色的)流动或半流动粘稠液,略轻于水。原油相对密度一般在0.75~0.95之间,少数大于0.95或小于0.75,相对密度在0.9~1.0之间的称为重质原油,小于0.9的称为轻质原油。原油粘度范围很宽,凝固点差别很大(-60~30℃),沸点范围为常温到500℃以上。它由不同的碳氢化合物混合组成,其主要组成成分是烷烃,还含有硫、氧、氮、磷、钒等元素。可溶于多种有机溶剂,不溶于水,但可与水形成乳状液。不同油田的石油成分和外观可以有很大差别。
主要用途:原油主要被用来作为燃油和生产各种油品等,也是许多化学工业产品,如溶剂、化肥、杀虫剂和塑料等的原料。
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原创 | 2016-9-6 20:21:08
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原创 | 2016-9-28 19:58:49
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原创 | 2016-9-30 14:38:43
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Re:在漫画中识别身边的违章 | 2016-10-8 15:09:05
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Re:在漫画中识别身边的违章 | 2016-10-10 21:02:55
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Re:在漫画中识别身边的违章 | 2016-10-17 2:47:46
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By:jhwae(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复
Re:在漫画中识别身边的违章 | 2016-10-19 15:22:08
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Re:在漫画中识别身边的违章 | 2017-2-17 23:14:25
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