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reference system
med.	sistema de referencia
reference systems
astr.	sistemas de referencia

Reference System : 57 phrases in 22 subjects

Automatic control	1
Communications	10
Computer numerical control	1
Earth sciences	1
Electric motors	1
Electronics	5
Environment	3
Finances	1
Fishery fishing industry	1
Forestry	2
Immigration and citizenship	1
Information technology	2
Life sciences	1
Measuring instruments	1
Meteorology	1
Military	1
Physical sciences	1
Technology	5
Telephony	5
Transport	8
United Nations	4
Work flow	1