Ulrich Bretscher's pocket watches, sewage treatment, black powder

Klicks: 147, Website hinzugefügt: Apr 4, 2014

	Ulrich Bretscher's pocket watches, sewage treatment, black powder
LINK :	musketeer.ch
Land:	Schweiz
Stichwort 1:	phosphorus elimination
Stichwort 2:	sewage treatment
Stichwort 4:	thermophilic digester
Stichwort 5:	digester
Stichwort 6:	pumping costs
Stichwort 7:	saltpeter
Stichwort 8:	charcoal
Stichwort 9:	sulfur
Stichwort 10:	homemade black powder

Beschreibung: