Material handling device Patent
Device which separates and screens particles of soil samples for vidicon viewing in vacuum and reduced gravity environments
Ritchie, D. G.↗
Engineering topics
Ritchie, D. G.
Publications and source records attributed to Ritchie, D. G..
Soil particles separator, collector and viewer Patent
Development of device for separating, collecting, and viewing soil particles
Ritchie, D. G.↗