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for subject
Ecology
containing
底层
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all forms
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in specified order only
Chinese
English
划痕打
底层
scratch coat
双层海底管道系统
pipe-in-pipe system
底土层
substratum
底土层
substrate
底基层
subbase course
底基层排水
subbase drain
底基层排水
subbase course drainage
沙地
底层
衬膜
film-bottomed tillage in sandy land
海底表层取样
sea floor surficial sampling
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