Automatic sprinkling device

作者: Ralph V Higgins

DOI:

关键词:

摘要:

参考文章(8)
Dodge Theodore, Automatic watering device ,(1935)
Walter H Wakefield, John C Manoog, Electronic weft detector for looms ,(1946)
Marvin L Seyffert, Device for controlling ice formations ,(1945)
Lazzarini Eugen, Time-lag cathode circuit arrangement ,(1934)
Marcus E Fiene, Humidity responsive device ,(1931)
William F Wolfner, Electronic control apparatus ,(1941)
Hammer Sigwald M, Power supply circuit ,(1935)