Posthole digger attachment for tractors
作者： Arps Bruno F , Arps Frederick B
DOI:
关键词: Tractor 、 Simulation 、 Engineering 、 Character (mathematics) 、 Object (computer science) 、 Raising (metalworking) 、 Digging 、 Engineering drawing
摘要: The present invention relates to an attachment for tractors digging post holes and being powered by the tractor engine having preferably hydraulic means raising lowering auger. An object of is provide a device character which can be operated...
lens.org 参考文章(3)
Garner Carlton Morris, Tractor operated hole digger ,(1942)
John M Humiston, Earth-boring machine ,(1921)
Dunn John, POST HOLE DIGGER ,(1906)