154 B
154 B
20240217112301 G.A. Campbell
#tech #circuit #person #electronics
FIlter考えた人 1870 - 1954 https://en.wikipedia.org/wiki/George_Ashley_Campbell
#tech #circuit #person #electronics
FIlter考えた人 1870 - 1954 https://en.wikipedia.org/wiki/George_Ashley_Campbell