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to phrases
bottom equipment
eng.geol.
孔内设备
钻具下部、过滤器、深井泵等
oil
井底设备
tech.
孔内设备
(过滤器,深井泵等)
;
井内设备
(过滤器、深井泵等)
bottom equipment
:
6 phrases
in 1 subject
Metallurgy
6
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