| 释义 | DictionarySeebottom bottoms
 bottoms[′bäd·əmz]  (chemical engineering) Residual fractions that remain at the bottom of a fractionating tower following distillation of the lighter components.   (petroleum engineering)  basic sediment and waterBOTTOMS
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 | BOTTOMS➣Benthic Observatory and Technology Testbed on the Mid Shelf (Skidway Institute of Oceanography) |  | BOTTOMS➣Back On To The Old Manual System | 
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