GB1252913A
(enExample )
1971-11-10
GB720744A
(enExample )
US2057845A
(en )
1936-10-20
Electrical measuring instrument
US2875411A
(en )
1959-02-24
Electrical instrument with a drum indicating dial
US2508380A
(en )
1950-05-23
Moving coil electrical measuring
GB905502A
(en )
1962-09-12
Improvements in differential pressure gauge
GB456988A
(enExample )
GB378983A
(en )
1932-08-25
Apparatus for measuring magnetically the thickness of iron plates and the like
GB738910A
(en )
1955-10-19
Improvements relating to polarity indicators for magnets
GB660763A
(enExample )
GB564181A
(en )
1944-09-15
Electrical indicating instruments and scale adjustments therefor
GB672145A
(enExample )
SU789922A1
(ru )
1980-12-23
Магнитный мост посто нного потока
GB293402A
(en )
1928-07-02
Improvements in or relating to electric measuring instruments
GB810423A
(en )
1959-03-18
Apparatus for testing a characteristic of ferromagnetic materials
Bennett
1949
A review of methods for coating-thickness determination
GB800655A
(en )
1958-08-27
Improvements in or relating to multi-range electrical meters
CN117711247A
(zh )
2024-03-15
一种新型磁悬浮实验装置
Landry et al.
1957
An improved single-phase watt-hour meter
Hughes
1881
II. Molecular electro-magnetic induction
GB591204A
(en )
1947-08-11
Improvements relating to electromagnetic telephone instruments
Knight
1949
A sensitive balance for stability tests on permanent magnets
GB828459A
(en )
1960-02-17
Improvements in or relating to electric ratiometers
CN1247317A
(zh )
2000-03-15
交直两用钳型电流表
GB757060A
(en )
1956-09-12
Improvements in or relating to ring balances