发明授权
US3643920A Procedure and device for felling of timber 失效
木材粉碎的程序和装置

Procedure and device for felling of timber
摘要:
Timber-felling method according to which the tree is drawn up with its roots by a mechanical device, the tree being first pulled out of the ground in a vertical direction and thereafter prized at an increasing angle thereto.
信息查询
0/0