单选题In order to accurately measure very low pressures, which of the instruments listed should be used?（）ACompound gageBBonrdon tubeCManometerDDeadweight gage
单选题
In order to accurately measure very low pressures, which of the instruments listed should be used?（）
A
Compound gage
B
Bonrdon tube
C
Manometer
D
Deadweight gage
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