| 摘要 |
PCT No. PCT/GB91/01848 Sec. 371 Date Apr. 16, 1993 Sec. 102(e) Date Apr. 16, 1993 PCT Filed Oct. 22, 1991 PCT Pub. No. WO92/06579 PCT Pub. Date Apr. 30, 1992.A plough having a landslide and tilling mechanism, illustrated as a rotary disc or soil inversion wheel, which is pivotable in relation to the landslide between alternative positions providing for the left-hand or right-hand formation of a furrow, depending upon the direction of ploughing, when the plough is required to operate back and forth across a field.
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