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Petroleum Information
abbr., oil
PI
Petroleum:
119 phrases
in 17 subjects
Agriculture
2
Chemistry
29
Coal
9
Earth sciences
1
Economy
5
Energy industry
17
Environment
13
General
1
Industry
1
Mechanic engineering
2
Medical
5
Natural sciences
1
Oil / petroleum
10
Politics
2
Statistics
3
Taxes
5
Transport
13
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