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- 这也有其他语言版本:
- English (en)
- Français (fr)
- Português (pt)
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- This seed cleaner was developed in Afghanistan to remove round seeds of weeds from wheat grains. The round seeds could not be separated by a sieve because they were the same size as the wheat grains. The cleaner described here takes advantage of the round shape of the weed seeds to separate them...
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