The Torsional Vibrometer with Long Natural Period
長周期ねじり振動計の試作研究

Teruo TAKAGAMI, Yasuo JIMBO, Masaharu TAKANO
1971 Journal of the Japan Society of Precision Engineering  
doi:10.2493/jjspe1933.37.145 fatcat:p6udh3z2lrcyjnm5qwx3ylqap4