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绳子与水桶
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10:10, 7 November 2015
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- 通过畜力运作的绳与双桶提水装置每分钟能供水200多升<br>
| valign="top" | - 通过人力运作的绳桶提水装置每分钟仅能供水15升<br>
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动物需要全年养护,即使不用灌溉时
即使不用灌溉时,动物仍需要全年的养护
<br>
- 传统的人畜运作设计相对低效(10-40%)<br>
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