NO742131L - - Google Patents
Info
- Publication number
- NO742131L NO742131L NO742131A NO742131A NO742131L NO 742131 L NO742131 L NO 742131L NO 742131 A NO742131 A NO 742131A NO 742131 A NO742131 A NO 742131A NO 742131 L NO742131 L NO 742131L
- Authority
- NO
- Norway
- Prior art keywords
- water
- regeneration
- resins
- fed
- stated
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 239000011347 resin Substances 0.000 claims description 38
- 229920005989 resin Polymers 0.000 claims description 38
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 28
- 230000008929 regeneration Effects 0.000 claims description 28
- 238000011069 regeneration method Methods 0.000 claims description 28
- 239000000126 substance Substances 0.000 claims description 28
- 238000011282 treatment Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000012528 membrane Substances 0.000 claims description 16
- 239000011780 sodium chloride Substances 0.000 claims description 14
- 239000002351 wastewater Substances 0.000 claims description 14
- 125000000129 anionic group Chemical group 0.000 claims description 11
- 238000005868 electrolysis reaction Methods 0.000 claims description 10
- 125000002091 cationic group Chemical group 0.000 claims description 9
- 150000001450 anions Chemical class 0.000 claims description 8
- 238000001223 reverse osmosis Methods 0.000 claims description 8
- 150000001768 cations Chemical class 0.000 claims description 7
- 150000002894 organic compounds Chemical class 0.000 claims description 7
- 150000002500 ions Chemical class 0.000 claims description 6
- 235000011389 fruit/vegetable juice Nutrition 0.000 claims description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 238000006386 neutralization reaction Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 239000000908 ammonium hydroxide Substances 0.000 description 5
- 238000004042 decolorization Methods 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000004064 recycling Methods 0.000 description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 238000005115 demineralization Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- KDCGOANMDULRCW-UHFFFAOYSA-N 7H-purine Chemical compound N1=CNC2=NC=NC2=C1 KDCGOANMDULRCW-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 235000001014 amino acid Nutrition 0.000 description 2
- 150000001413 amino acids Chemical class 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 230000002328 demineralizing effect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- KWIUHFFTVRNATP-UHFFFAOYSA-N glycine betaine Chemical compound C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 239000000347 magnesium hydroxide Substances 0.000 description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 235000013343 vitamin Nutrition 0.000 description 2
- 229940088594 vitamin Drugs 0.000 description 2
- 229930003231 vitamin Natural products 0.000 description 2
- 239000011782 vitamin Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000004475 Arginine Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 description 1
- ODKSFYDXXFIFQN-BYPYZUCNSA-P L-argininium(2+) Chemical compound NC(=[NH2+])NCCC[C@H]([NH3+])C(O)=O ODKSFYDXXFIFQN-BYPYZUCNSA-P 0.000 description 1
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 description 1
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 description 1
- KDXKERNSBIXSRK-YFKPBYRVSA-N L-lysine Chemical compound NCCCC[C@H](N)C(O)=O KDXKERNSBIXSRK-YFKPBYRVSA-N 0.000 description 1
- OUYCCCASQSFEME-QMMMGPOBSA-N L-tyrosine Chemical compound OC(=O)[C@@H](N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-QMMMGPOBSA-N 0.000 description 1
- KDXKERNSBIXSRK-UHFFFAOYSA-N Lysine Natural products NCCCCC(N)C(O)=O KDXKERNSBIXSRK-UHFFFAOYSA-N 0.000 description 1
- 239000004472 Lysine Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- CZPWVGJYEJSRLH-UHFFFAOYSA-N Pyrimidine Chemical compound C1=CN=CN=C1 CZPWVGJYEJSRLH-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- ODKSFYDXXFIFQN-UHFFFAOYSA-N arginine Natural products OC(=O)C(N)CCCNC(N)=N ODKSFYDXXFIFQN-UHFFFAOYSA-N 0.000 description 1
- 235000003704 aspartic acid Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 description 1
- 229960003237 betaine Drugs 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 235000013922 glutamic acid Nutrition 0.000 description 1
- 239000004220 glutamic acid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013379 molasses Nutrition 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
- B01D61/026—Reverse osmosis; Hyperfiltration comprising multiple reverse osmosis steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/06—Specific process operations in the permeate stream
Landscapes
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Electrochemistry (AREA)
- Organic Chemistry (AREA)
- Nanotechnology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Detergent Compositions (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT25392/73A IT989187B (it) | 1973-06-15 | 1973-06-15 | Processo per la depurazione di acque di scarico |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO742131L true NO742131L (da) | 1975-01-13 |
Family
ID=11216568
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO742131A NO742131L (da) | 1973-06-15 | 1974-06-12 | |
| NO783870A NO783870L (no) | 1973-06-15 | 1978-11-17 | Fremgangsmaate for rensing av spillvann |
| NO783869A NO783869L (no) | 1973-06-15 | 1978-11-17 | Fremgangsmaate for rensing av spillvann |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO783870A NO783870L (no) | 1973-06-15 | 1978-11-17 | Fremgangsmaate for rensing av spillvann |
| NO783869A NO783869L (no) | 1973-06-15 | 1978-11-17 | Fremgangsmaate for rensing av spillvann |
Country Status (25)
| Country | Link |
|---|---|
| US (1) | US3962077A (da) |
| JP (1) | JPS5033174A (da) |
| AT (1) | AT335378B (da) |
| BE (1) | BE816280A (da) |
| CA (1) | CA1025801A (da) |
| CH (1) | CH605419A5 (da) |
| CS (1) | CS178921B2 (da) |
| DD (1) | DD112422A5 (da) |
| DE (1) | DE2428562C3 (da) |
| DK (1) | DK146200C (da) |
| ES (1) | ES427357A1 (da) |
| FI (1) | FI173474A (da) |
| FR (1) | FR2233288B1 (da) |
| GB (1) | GB1466730A (da) |
| HU (1) | HU175309B (da) |
| IE (1) | IE39978B1 (da) |
| IL (1) | IL45072A (da) |
| IT (1) | IT989187B (da) |
| LU (1) | LU70283A1 (da) |
| NL (1) | NL7408021A (da) |
| NO (3) | NO742131L (da) |
| PL (1) | PL90372B1 (da) |
| SE (1) | SE7407907L (da) |
| TR (1) | TR17927A (da) |
| YU (2) | YU36675B (da) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2724724C3 (de) * | 1977-06-01 | 1982-12-16 | Nihon Filter Co. Ltd., Tokyo | Verfahren und Anlage zum Aufbereiten von schwermetallhaltigen Abwässern unter Rückgewinnung von Schwermetallen |
| DE3105550C2 (de) * | 1981-02-16 | 1983-10-20 | Hager & Elsässer GmbH, 7000 Stuttgart | Verfahren zur weitestgehenden Aufbereitung von Süßwasser, Brackwasser, Meerwasser und Abwasser zu Trink- und Brauchwasserzwecken |
| JPS60139656A (ja) * | 1983-12-27 | 1985-07-24 | Ajinomoto Co Inc | リジン製造法 |
| US5019542A (en) * | 1990-01-08 | 1991-05-28 | RAR - Refinarias De Accucar Reunidas, S.A. | Processing for regenerating sugar decolorizing ion exchange resins, with regenerant recovery |
| EP0882803B1 (en) * | 1997-04-09 | 2003-09-10 | Rohm And Haas Company | Decolorization of sugar syrups using functionalized adsorbents comprising a highly crosslinked macroporous styrenic copolymer |
| CN102219330B (zh) * | 2010-04-15 | 2013-01-23 | 中国科学院过程工程研究所 | 一种从赖氨酸离交废液脱无机盐的多级处理方法 |
| CN103755082B (zh) * | 2014-01-21 | 2015-07-01 | 西安西热水务环保有限公司 | 一种离子交换树脂再生废水资源回收系统及方法 |
| CN109775900A (zh) * | 2019-03-29 | 2019-05-21 | 泽润环境科技(广东)有限公司 | 表面处理废水的近零排放处理工艺及其系统 |
| CN110372527B (zh) * | 2019-08-13 | 2020-10-09 | 江南大学 | 一种从谷氨酸浓缩等电母液中回收谷氨酸的方法 |
| CN112723675A (zh) * | 2020-12-26 | 2021-04-30 | 浙江华康药业股份有限公司 | 一种离交再生污水除钙系统及方法 |
| CN115557633B (zh) * | 2022-09-28 | 2023-05-05 | 西南石油大学 | 一种废水处理与电解制氢的一体化系统及运行方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3268441A (en) * | 1963-05-21 | 1966-08-23 | Ionics | Water recovery by electrodialysis |
| GB1350261A (en) * | 1970-10-16 | 1974-04-18 | Hitachi Shipbuilding Eng Co | Sugar refining process |
| US3639231A (en) * | 1970-11-13 | 1972-02-01 | Bresler And Associates Inc | Desalination process |
| US3766049A (en) * | 1971-08-26 | 1973-10-16 | Process Res Inc | Recovery of metal from rinse solutions |
| US3791866A (en) * | 1972-08-07 | 1974-02-12 | Rohm & Haas | Recovery of waste brine regenerant |
| US3823086A (en) * | 1973-01-22 | 1974-07-09 | Culligan Int Co | Pretreatment for reverse osmosis process |
-
1973
- 1973-06-15 IT IT25392/73A patent/IT989187B/it active
-
1974
- 1974-05-24 GB GB2347474A patent/GB1466730A/en not_active Expired
- 1974-06-05 CH CH769474A patent/CH605419A5/xx not_active IP Right Cessation
- 1974-06-06 FI FI1734/74A patent/FI173474A/fi unknown
- 1974-06-10 LU LU70283A patent/LU70283A1/xx unknown
- 1974-06-11 ES ES427357A patent/ES427357A1/es not_active Expired
- 1974-06-11 CA CA202,334A patent/CA1025801A/en not_active Expired
- 1974-06-12 FR FR7420371A patent/FR2233288B1/fr not_active Expired
- 1974-06-12 NO NO742131A patent/NO742131L/no unknown
- 1974-06-13 BE BE145376A patent/BE816280A/xx unknown
- 1974-06-13 YU YU1656/74A patent/YU36675B/xx unknown
- 1974-06-13 DK DK317274A patent/DK146200C/da not_active IP Right Cessation
- 1974-06-13 DD DD179144A patent/DD112422A5/xx unknown
- 1974-06-14 HU HU74TE783A patent/HU175309B/hu unknown
- 1974-06-14 SE SE7407907A patent/SE7407907L/xx not_active Application Discontinuation
- 1974-06-14 US US05/479,558 patent/US3962077A/en not_active Expired - Lifetime
- 1974-06-14 PL PL1974171915A patent/PL90372B1/pl unknown
- 1974-06-14 DE DE2428562A patent/DE2428562C3/de not_active Expired
- 1974-06-14 AT AT495174A patent/AT335378B/de not_active IP Right Cessation
- 1974-06-14 NL NL7408021A patent/NL7408021A/xx not_active Application Discontinuation
- 1974-06-14 JP JP49067275A patent/JPS5033174A/ja active Pending
- 1974-06-14 IE IE1259/74A patent/IE39978B1/xx unknown
- 1974-06-15 TR TR17927A patent/TR17927A/xx unknown
- 1974-06-17 CS CS7400004251A patent/CS178921B2/cs unknown
- 1974-06-20 IL IL7445072A patent/IL45072A/en unknown
-
1978
- 1978-11-17 NO NO783870A patent/NO783870L/no unknown
- 1978-11-17 NO NO783869A patent/NO783869L/no unknown
-
1981
- 1981-01-07 YU YU0019/81A patent/YU36673B/xx unknown
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