农业机械学89

农业机械学89

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P P w 但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但 但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但 P g 但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但 但但但但但但但 但 P = P g + P w 但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但 P g
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但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但但 1~2m / s 但但但但但但但但但但但但但但但但但但但 10~20m/s 但但但但但但但 但但但 40~50m/s 但但但但但但但但但但但但但但但但但但但但但但但但 但但但但但
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3 但但但但但但但但但但但但但 但但但但但但但但但但但但但但但但但但但但但但但但但但但但—但但但但但但但但
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This note was uploaded on 01/31/2012 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89

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