名次后缀
发表于 2025-4-1 04:21:07
SED Electrodynamic Geophones, in metal structures and buildings, which operate in the range from 10–20 cps to several kilocycles , In particular, in 1937–1938 the author and G. A. Surin developed an electrodynamic vibration detector for use at audio frequencies , intended for investigating vibrations in buildings and in the Earth.