Automatic shutoff device for a milking apparatus
作者： Patterson Glenn A , Gillette Allen K
DOI:
关键词:
摘要:
lens.org 参考文章(3)
William G Rowell, Magnet controlled shut-off valve ,(1949)
Valia S Golemon, Vacuum milking machines ,(1956)
Jack C Wilson, Harry W Wilson, Magnetic wand actuated toy ,(1950)