tayyorishlar

Mahsulot tavsifi

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

#water#hygiene#health factor

Muallif

Maxmudjon Fattayev
Maxmudjon FattayevTasdiqlangan muallif
Hujjatlari
13 024
Sotilgan
194

O'xshash hujjatlar