共 50 条
- [21] ABSORBED DOSE CALIBRATION SYSTEM OF NATIONAL-BUREAU-OF-STANDARDS PHYSICS IN MEDICINE AND BIOLOGY, 1977, 22 (03): : 559 - 559
- [22] IMPROVEMENTS IN ATOMIC CESIUM BEAM FREQUENCY STANDARDS AT NATIONAL BUREAU OF STANDARDS NBS MONOGRAPH, 1974, (M140): : 111 - 117
- [25] Evolution of Microwave Spectroscopy at the National Bureau of Standards (NBS) and the National Institute of Standards and Technology (NIST) JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, 2012, 117 : 268 - 296
- [26] THE PIEZOELECTRIC RECIPROCITY METHOD FOR ABSOLUTE CALIBRATION OF HIGH-FREQUENCY VIBRATION STANDARDS KEXUE TONGBAO, 1984, 29 (06): : 735 - 739
- [27] INVESTIGATIONS OF HIGH-FREQUENCY ECHOES .3. PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1952, 40 (09): : 1065 - 1068
- [28] HIGH-VACUUM STANDARDS AT THE NATIONAL-BUREAU-OF-STANDARDS 1988 WORKSHOP AND SYMPOSIUM, TECHNICAL PRESENTATIONS : COMPETITIVENESS IN A WORLD MARKET, 1988, : 591 - 604
- [29] PREPARATION AND CALIBRATION OF THE 1978 NATIONAL-BUREAU-OF-STANDARDS TRITIATED-WATER STANDARDS INTERNATIONAL JOURNAL OF APPLIED RADIATION AND ISOTOPES, 1980, 31 (10): : 611 - 614
- [30] CALIBRATION OF NATIONAL BUREAU OF STANDARDS TRITIATED-TOLUENE STANDARD OF RADIOACTIVITY INTERNATIONAL JOURNAL OF APPLIED RADIATION AND ISOTOPES, 1965, 16 (01): : 27 - +