Door control apparatus
作者： William F Eames
DOI:
关键词: Control (management) 、 Control theory 、 Computer science
摘要:
lens.org 参考文章(5)
James Dunlop, Kinnard Luther J, Selenium cell door closer ,(1929)
Jr Charles E Ellis, Safety device for vehicle doors ,(1929)
James H Burnside, Counting apparatus operated by radiant energy ,(1933)
Harry C Miller, Door control system ,(1935)
Harry R Crago, Door operating apparatus ,(1931)