logarithmic voltmeter造句

例句与造句

1. From 1929-1934 he was President of the Boonton Research Laboratories investigating errors in microphones due to diffraction and cavity resonance, and developing new devices including an electrostethoscope, automatic optical recorder for frequency-response measurements, and logarithmic voltmeter.
2. It's difficult to find logarithmic voltmeter in a sentence. 用logarithmic voltmeter造句挺难的