Seed spacing drill
作者： Reilly Hugh Lambert
DOI:
关键词: Mining engineering 、 Drill 、 Geology
摘要:
lens.org 参考文章(3)
Bausman Alonzo Linton, Confection-making machine ,(1928)
Bernard H Ward, Rotary seed disk with peripheral pockets protected by a flexible cover engaging said pockets ,(1949)
William H Thompson, William F Wamhoff, Planter attachment for tractors ,(1930)