After | Après | Después de | Nach | Dopo ZERO (p. 10)
Free Chlorine | Chlore libre | Cloro libre
Freies Chlor | Cloro libero
DPD
N° 1
3
4
Photometer
4
completely
dissolved
pH
ZERO
TA
pH
ZERO
TA
NO
tCl
tCl
residue
fCl
fCl
6
5
!
pH
ZERO
TA
pH
ZERO
TA
tCl
tCl
fCl
fCl
17
