Improvements in or relating to mechanical multiplying apparatus for the integration of the product of two variables and its application to measuring instruments
摘要
申请公布号
GB714874(A)
申请公布日期
1954.09.01
申请号
GB19520006199
申请日期
1952.03.10
申请人
COMPAGNIE POUR LA FABRICATION DES COMPTEURS ET MATERIEL D'USINES A GAZ
