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管道补给

20 bytes removed, 02:57, 29 August 2015
Costs
* 在大规模应用补给系统前,需要通过小型试用系统进一步考量其有效性。
===Costs费用===* Total costs per system (drilling, tubes, labour): US$ 5 每个系统的总成本(钻孔、管道和人工):5- 30.30美元* Step auger or Baptist drill set for holes up to 12 m (can be used for many holes): US$ 75.使用钻孔工具可钻取深度为12米的洞(可用来钻取很多洞):75美元
If the holes are drilled by families themselves, the costs can be minimised.如果农民自行钻洞,费用会降到最低。
===Manuals, videos and links===
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