How to filter water from a river for drinking in the UK
65.6 هزار بار بازدید -
17 سال پیش
-
Filtering your drinking supply. When
Filtering your drinking supply. When in the wilds, learn how to drink water from rivers safely. We explore the basic and the sophisticated techniques available.
www.undercurrents.org/
17 سال پیش
در تاریخ 1386/04/13 منتشر شده
است.
65,610
بـار بازدید شده