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A detailed study on the importance of water in human life, various water supply issues, quality standards, local water supply systems, and the improvement methods of water quality. Includes information on the global access to improved drinking-water sources
Teglar
#water#hygiene#health factor
Premium Content
СУВ
4,300so'm
Betlar soni
42 taFayl hajmi
5.15 MBFayl turi
.ppt
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Maxmudjon Fattayev
Tasdiqlangan sotuvchi
Jami mahsulotlar12580 ta
Sotilgan148 ta