Sunday, 23 August, 2026г.
Где искать: по сайтам Запорожской области, статьи, видео ролики
пример: покупка автомобиля в Запорожье
A villager of Xepatan in Guatemala tells about making a rope pump
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Demotech, design for self-reliance, developed an improved ropepump design. - high water outlet, no more carrying buckets - thin PVC pipes, so cheap, and still a lot of water - build by the farmers themselves with their tools - can be build for less than 10 euros
Теги:
Xepatan guatemala demotech rope pump water well appropriate technology base pyramid bop pro poor innovation
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