农业机械学34

农业机械学34

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验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验 验验验验验 ) ( h D h - b≤2 tgα 验验验 a b≥ 验 1.5~2 验 a 验验验 验验验验验验验验验验验验验验验验验验
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验验验 验验验 1 验验验验验验验验验验 2 验验验验验验验验验验 1 验验验验验验验验验验验验 b≥ 验 1.5~2 验 a 验验验验验验验 验验验验验验验验验验验验验验验验验 2 验验验验验验验验验验验验验验验验 2 验验验验验验验验验验验验验验验验验 验验验验验验验验验验验验验验验验验验验验
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验验验 验验验验验验验验验验验验验验验验验验验验验验验验验验
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四四四四四四四四四四 四四四四四四四四四四 验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验验 验验验验验
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This note was uploaded on 01/30/2012 for the course AGRICULTUR agricultur taught by Professor Tinglina during the Summer '07 term at Nanjing University.

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农业机械学34

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