| 摘要 |
PCT No. PCT/AU89/00032 Sec. 371 Date Aug. 10, 1990 Sec. 102(e) Date Aug. 10, 1990 PCT Filed Jan. 31, 1989 PCT Pub. No. WO89/06897 PCT Pub. Date Aug. 10, 1989.Plough apparatus comprising a wheeled support structure (10) that supports a plough beam (20) that is pivotable in a horizontal plane about the center of the support structure between first and second plough beam positions. The plough beam (20) carries a plurality of plough discs (50) or reversible mould boards (100) that are rotatable about a vertical axis between first and second ploughing positions corresponding respectively with the plough beam positions so that the plough apparatus can produce right or left hand furrows as desired.
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