In Zambia, a survey found that there were over 40 different types of hand pumps scattered all over the country, resulting in high costs for spare parts, deficient operation and maintenance, and eventual abandonment of some of those systems.
在赞比亚，调查结果发现，全国各地有40多种不同类别的手动水泵，因此零部件费用很高，运转和保养不良，有些系统最终只得放弃。