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Rücklaufschlamm m
chem.	activated sludge
environ.	return suspended solids; returned activated sludge
nat.res.	return activated sludge
Rücklaufschlamm RS m
gen.	return activated sludge RAS
Rücklaufschlämm m
construct.	activated return sludge

Rücklaufschlamm: 2 phrases in 2 subjects

Construction	1
Environment	1