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эталонный измерительный прибор stresses
gen.	standard gauge
auto.	standard instrument
el.	calibration instrument
meas.inst.	reference measuring instrument (Andreyka)
nautic.	master gauge
qual.cont.	reference gauge; standard gage; standard measuring instrument; reference gage
tech.	master measuring tool; primary instrument; standard meter; reference instrument

эталонный измерительный прибор: 2 phrases in 2 subjects

Mass media	1
Measuring instruments	1