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意思解释：（Heavy oil）高比重的油；特指由焦油蒸馏出的高沸点蒸馏物。 从煤焦油分馏出来的，沸点在230°－300℃之间的部分。可提取化工原料，也用作木材的防腐剂。
由天然石油或人造石油提取汽油、煤油和柴油后的液态残余物。又指从炼焦油分馏出来的，沸点在230—300℃之间的部分。1906年《博物学教科书》第三编:“易散油极易燃烧，不宜于点灯之用。此易散油蒸出后，即为灯用石油。其残留者…
The liquid state odd-come-short after extracting benzine, kerosene and derv by crude oil or man-made oil. Point to what come out from refine tar fractional distillation again, boiling point is in 230, the part between 300 ℃ . 1906 does nature science learn schoolbook the 3rd make up: Does avoid of at present of of graph of the ⒂ that make consult smooth with a rake blink deceive of of riverside of astounded of closely question of grey Sou to fold of Zong of laborious of Ru of lowing F of of plain Meng of second of of dirty Xi of boat of camel of 4 consult ⒂
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