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基准参照，坐标系
auto. reference system
基准系
met. reference frame
基准 系: 139 phrases in 19 subjects
Air defense1
Animal husbandry1
Automobiles1
Aviation53
Computer networks1
Economy2
Electric machinery1
Electronics15
French1
General2
Geophysics1
Information technology1
International trade1
Marketing1
Nautical1
Securities2
Space39
Technology14
United Nations1

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