共 50 条
- [1] A DIRECT-READING MICRODENSITOMETER JOURNAL OF SCIENTIFIC INSTRUMENTS, 1953, 30 (08): : 268 - 270
- [4] DIRECT-READING WAVEMETERS PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1947, 35 (02): : 179 - 179
- [5] A SIMPLE DIRECT-READING FLUXMETER JOURNAL OF SCIENTIFIC INSTRUMENTS AND OF PHYSICS IN INDUSTRY, 1949, 26 (02): : 40 - 42
- [6] A DIRECT-READING PHOTOELECTRIC DENSITOMETER JOURNAL OF THE SOCIETY OF MOTION PICTURE ENGINEERS, 1939, 33 (04): : 403 - 409
- [7] Direct-reading frequency meter PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1931, 19 (04): : 0659 - 0663
- [10] A DIRECT-READING DIFFERENTIAL MICROMANOMETER JOURNAL OF SCIENTIFIC INSTRUMENTS, 1947, 24 (11): : 295 - 297