专利名称：OSCILLATING PLOW AND TRENCHER COMBINATION
发明人：HANSEN R,US
舞蹈开门红
青色五月申请号：US3727331D
申请日：19711020
公开号：US3727331A
柔美的反义词>蹦床篮球公开日：
事迹介绍
劫后余生的意思是什么19730417
专利内容由知识产权出版社提供
古诗暮江吟摘要：When a trench is to be dig for the purpo of laying pipe, cable, or tubing, the cutting mechanism includes a blade which is vibrated vertically by a suitable driving means, and which can also be adjusted horizontally to provide space through which the trenching mechanism may be moved so that it is possible to u either the trenching machine alone or the plow mechanism alone, or the u of both mechanisms simultaneously if required.
申请人：HANSEN R,US
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