Improvements in or relating to means for automatically adjusting or setting an oscillatory or vibratory system so that its natural frequency of vibration matches a predetermined frequency
摘要
申请公布号
GB664413(A)
申请公布日期
1952.01.09
申请号
GB19490000220
申请日期
1949.01.04
申请人
S. SMITH & SONS (ENGLAND) LIMITED;FURZEHILL LABORATORIES LIMITED
