FI46057C
(en )
1972-12-11
Sewage treatment plant.
DK109317C
(en )
1968-04-16
Chemical purification plant.
DK107088C
(en )
1967-04-24
Chemical purification plant.
DK129979B
(en )
1974-12-09
Wastewater treatment plant.
DK125847B
(en )
1973-05-14
Aerator for biological treatment of wastewater.
DK105732C
(en )
1966-10-31
Treatment plants for pipelines.
DK103102C
(en )
1965-11-15
Automatic cheese-making plant.
DK131901B
(en )
1975-09-22
Cyclic approach to sewage sludge treatment.
DK128068B
(en )
1974-02-25
Wastewater treatment plant in an annular aeration basin.
DK125413B
(en )
1973-02-19
Method and plant for biological treatment of wastewater.
DK106252C
(en )
1967-01-09
Means for influencing plant growth.
DK130066B
(en )
1974-12-16
Wastewater treatment plant.
DK131026B
(en )
1975-05-20
Aeration device for biological treatment of wastewater.
DK101049C
(en )
1965-02-15
Biological wastewater treatment plant.
AT246068B
(en )
1966-03-25
Biological wastewater treatment plant
DK109074C
(en )
1968-03-11
Biological wastewater treatment plant.
DK99920C
(en )
1964-09-28
Wastewater treatment plant.
DK106169C
(en )
1966-12-27
Soil sterilizer.
DK100775C
(en )
1965-01-11
Wastewater treatment plant.
DK123814B
(en )
1972-08-07
Biological wastewater treatment plant.
DK109024C
(en )
1968-03-04
Method and plant for wastewater treatment.
CH419989A
(en )
1966-08-31
Small sewage treatment plant for biological wastewater treatment
DK98289C
(en )
1964-03-16
Method for biological treatment of wastewater and a round tank for carrying out the method.
FI36187A
(en )
1966-08-10
Sewage treatment plant
DK102022C
(en )
1965-06-21
Water treatment plant.