Improvements in or relating to apparatus for use in detecting the passage of wheeledvehicles
摘要
申请公布号
GB647268(A)
申请公布日期
1950.12.06
申请号
GB19470028895
申请日期
1947.10.29
申请人
THE SIEMENS AND GENERAL ELECTRIC RAILWAY SIGNAL COMPANY LIMITED;ALFRED RICHARD CARPENTER;HUBERT JOHN NAPIER RIDDLE;GENERAL ELECTRIC RAILWAY SIGNAL COMPANY LIMITED