资源 标记: Rope
2 条目已找到 (正在显示 1 - 2)
-
2003-01-01 Rope can be made from cord or string or even discarded plastic bags using a simple spindle to twist the materials together.
-
The mission of IDE,is to create income opportunities for poor rural households. Downloads related to various technologies being promoted by IDE (treadle pumps, rope pumps, water storage systems) include a very informative drip irrigation manual that can be accessed IDE views productive water as...