专利名称：TRENCHER发明人：L. ZUCCO申请号：AU5404279申请日：19791220公开号：AU5404279A公开日：19810625
摘要：The digger is attached to a tractor three point linkage and has a horizontal skiunder the chassis to regulate the depth of the channel being cut. A vertical, pivotallymounted disc carries a series of blades and shovel elements around its periphery. Thedisc directs the earth towards a curved deflecter and two smaller discs which are springbiased apart on a shaft are positioned so that their convex sections are placed against thesides of the channel to smooth the surface.
申请人：BOURGELA, R.
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