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关注：1
2013-05-23 12:21
求翻译：In the experimental setup a hopper that could contain a maximum of roughly 30 kg of fertiliser was used. The hopper opening could be set to achieve flow rates of 88, 250 or 523 g s1.是什么意思？ 待解决
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- 离问题结束还有
In the experimental setup a hopper that could contain a maximum of roughly 30 kg of fertiliser was used. The hopper opening could be set to achieve flow rates of 88, 250 or 523 g s1.
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