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环状空间
oil annulus
tech. hole annulus
环状空间〔裂缝，孔道，通路，面〕
gen. annulus
钻孔和套管间环状空间
eng.geol. annular space
环状空间
: 9 phrases in 5 subjects
Automobiles1
Earth sciences4
Electronics1
Oil / petroleum1
Technology2

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