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1
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1,
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Design of self-propelled direct insert precision hill-seeder of corn with whole plastic-film mulching on double ridges
DAI Fei
1
, YANG Zheng
2
, ZHAO Wu-yun
1,
*
, ZHANG Feng-wei
1
不同 Step 函数下播种运动轨迹与对应凸轮轮廓