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equation system
avia. 方程组; 方程系统; 方程体系
telecom. 等式系统
equation system: 80 phrases in 16 subjects
Agriculture1
Aviation4
Bridge construction2
Business33
Computers1
Corporate governance1
Economy1
Electronics1
Hydroelectric power stations2
International Monetary Fund1
Mathematics4
Mining1
Rail transport1
Sports1
Technology25
United Nations1