ES417005A1 - Procedimiento para preparar un fluido dielectrico. - Google Patents
Procedimiento para preparar un fluido dielectrico.Info
- Publication number
- ES417005A1 ES417005A1 ES417005A ES417005A ES417005A1 ES 417005 A1 ES417005 A1 ES 417005A1 ES 417005 A ES417005 A ES 417005A ES 417005 A ES417005 A ES 417005A ES 417005 A1 ES417005 A1 ES 417005A1
- Authority
- ES
- Spain
- Prior art keywords
- percent
- temperature
- less
- dissipation factor
- weight percent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012530 fluid Substances 0.000 title abstract 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 abstract 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 abstract 1
- 150000002148 esters Chemical class 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 150000002895 organic esters Chemical class 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/20—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06
- H01G4/22—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06 impregnated
- H01G4/221—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06 impregnated characterised by the composition of the impregnant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/02—Well-defined aliphatic compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/02—Well-defined aliphatic compounds
- C10M2203/022—Well-defined aliphatic compounds saturated
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/02—Well-defined aliphatic compounds
- C10M2203/024—Well-defined aliphatic compounds unsaturated
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/04—Well-defined cycloaliphatic compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/06—Well-defined aromatic compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
- C10M2207/044—Cyclic ethers having four or more ring atoms, e.g. furans, dioxolanes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/08—Aldehydes; Ketones
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/283—Esters of polyhydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/284—Esters of aromatic monocarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/285—Esters of aromatic polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/286—Esters of polymerised unsaturated acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/34—Esters having a hydrocarbon substituent of thirty or more carbon atoms, e.g. substituted succinic acid derivatives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/18—Containing nitrogen-to-nitrogen bonds, e.g. hydrazine
- C10M2215/182—Azo compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/14—Electric or magnetic purposes
- C10N2040/16—Dielectric; Insulating oil or insulators
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/14—Electric or magnetic purposes
- C10N2040/17—Electric or magnetic purposes for electric contacts
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Organic Insulating Materials (AREA)
- Lubricants (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US27299572A | 1972-07-18 | 1972-07-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES417005A1 true ES417005A1 (es) | 1976-06-01 |
Family
ID=23042115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES417005A Expired ES417005A1 (es) | 1972-07-18 | 1973-07-17 | Procedimiento para preparar un fluido dielectrico. |
Country Status (12)
Country | Link |
---|---|
BE (1) | BE802430A (it) |
BR (1) | BR7305307D0 (it) |
CA (1) | CA1012345A (it) |
DE (1) | DE2335692B2 (it) |
ES (1) | ES417005A1 (it) |
FR (1) | FR2193234B1 (it) |
GB (1) | GB1428746A (it) |
IN (1) | IN140131B (it) |
IT (1) | IT997376B (it) |
NO (1) | NO133949C (it) |
SE (1) | SE409152B (it) |
ZA (1) | ZA734354B (it) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4290926A (en) | 1976-03-24 | 1981-09-22 | General Electric Company | Non-halogenated impregnant for capacitors comprising an aromatic carboxylic acid ester and an alkene |
US4054937A (en) * | 1976-04-28 | 1977-10-18 | Westinghouse Electric Corporation | Capacitor |
US4266264A (en) * | 1977-06-24 | 1981-05-05 | Westinghouse Electric Corp. | Meta isopropyl biphenyl insulated electrical apparatus |
US4121275A (en) | 1977-06-27 | 1978-10-17 | Sprague Electric Company | Ester dielectric fluid containing tert-butyl anthraquinone |
JPH0758701B2 (ja) * | 1989-06-08 | 1995-06-21 | 株式会社東芝 | 半導体装置の製造方法 |
US7524440B2 (en) | 2003-10-02 | 2009-04-28 | Cooper Industries, Inc. | Method comprising additive for dielectric fluid |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1775716A (en) * | 1926-12-13 | 1930-09-16 | Dow Chemical Co | Composition of matter |
US2922938A (en) * | 1954-06-24 | 1960-01-26 | Gen Electric | Electric capacitor and stabilized dielectric material therefor |
GB882815A (en) * | 1959-03-21 | 1961-11-22 | Standard Telephones Cables Ltd | Electrical capacitor |
FR1525500A (fr) * | 1967-06-01 | 1968-05-17 | Montedison Spa | Composé alcoyl aromatique stabilisé, particulièrement utilisable comme huile pourtransformateurs et autres appareillages électriques |
-
1973
- 1973-06-26 ZA ZA734354A patent/ZA734354B/xx unknown
- 1973-06-28 CA CA175,195A patent/CA1012345A/en not_active Expired
- 1973-06-28 IN IN1512/CAL/73A patent/IN140131B/en unknown
- 1973-07-11 GB GB3302073A patent/GB1428746A/en not_active Expired
- 1973-07-13 DE DE2335692A patent/DE2335692B2/de not_active Withdrawn
- 1973-07-16 BR BR5307/73A patent/BR7305307D0/pt unknown
- 1973-07-16 IT IT41613/73A patent/IT997376B/it active
- 1973-07-17 SE SE7309986A patent/SE409152B/xx unknown
- 1973-07-17 ES ES417005A patent/ES417005A1/es not_active Expired
- 1973-07-17 FR FR7326138A patent/FR2193234B1/fr not_active Expired
- 1973-07-17 NO NO2900/73A patent/NO133949C/no unknown
- 1973-07-17 BE BE1005240A patent/BE802430A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
BE802430A (fr) | 1974-01-17 |
GB1428746A (en) | 1976-03-17 |
BR7305307D0 (pt) | 1974-08-29 |
SE409152B (sv) | 1979-07-30 |
FR2193234B1 (it) | 1977-02-18 |
DE2335692A1 (de) | 1974-01-31 |
CA1012345A (en) | 1977-06-21 |
NO133949B (it) | 1976-04-12 |
FR2193234A1 (it) | 1974-02-15 |
IN140131B (it) | 1976-09-18 |
IT997376B (it) | 1975-12-30 |
DE2335692B2 (de) | 1980-09-11 |
NO133949C (it) | 1976-07-21 |
SE7309986L (it) | 1974-01-19 |
AU5755673A (en) | 1975-01-09 |
ZA734354B (en) | 1974-05-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES383274A1 (es) | Procedimiento para producir microcapsulas conteniendo li- quido aceitoso. | |
ES417005A1 (es) | Procedimiento para preparar un fluido dielectrico. | |
ES402579A1 (es) | Procedimiento para la preparacion de derivados de 4-(omega-(flavon-7-il-oxi)-alcohil)-piperazina. | |
GB569527A (en) | Improvements in or relating to the manufacture of polymers of ethylene | |
NL7311279A (nl) | Werkwijze ter bereiding van smeermiddelen en normaliter vloeibare koolwaterstofbrandstoffen. | |
AR202689A1 (es) | Nuevo procedimiento para producir compuestos de 1,2,3,4,10 14b-hexahidro-pirazino (1,2-f) morfatridina | |
AR208498A1 (es) | Nuevos compuestos de (o-ciano-4-nitrofenil)eter de 3,5-dihalo-4-hidroxi-benzaldoxima aplicables como herbicidas composicioner que lo contienen y procedimiento para preparar dichos compuestos | |
ES414524A1 (es) | Perfeccionamientos en condensadores electricos con inflama-bilidad reducida. | |
BR7410364D0 (pt) | Fluximetro aperfeicoado para fluidos | |
BR7108654D0 (pt) | Composicoes de adjuvantes para fluidos de perfuracao | |
ES388655A1 (es) | Procedimiento para la produccion de un papel registrador sensible a la presion. | |
ES405783A1 (es) | Un metodo de hacer marcas sobre un sustrato formando un co-lor a partir de compuestos cromogenos incoloros o sustan- cialmente incoloros. | |
IT1006726B (it) | Procedimento per la preparazione di dispersioni in liquidi organici | |
IT1026972B (it) | Composti di silicio fenossi organici come fluidi dielettrici | |
ES311634A1 (es) | Un metodo para preparar polimeros olefinicos alcoxilados. | |
GB988373A (en) | Thermally stable substances | |
ES412312A1 (es) | Perfeccionamientos en catalizadores aptos para la oxidaciony la amoxidacion de hidrocarburos olefinicos. | |
ES431018A1 (es) | Procedimiento para la preparacion de 2-(2'-fluor-4-bifeni- lil)-propano. | |
AR213932A1 (es) | Nuevos compuestos de n-alquilcarbamato de(o-alquil-s-alquil-fosforiloxi o tiofosfosiloxi)-benzaldoxima,-acetofenonoxima o propiofenonoxima,procedimiento para su preparacion y composiciones insecticidas,acaricidas y nematocidas que los contienen | |
SU694531A1 (ru) | Антиокислительна присадка к нефт ным маслам | |
SU135560A1 (ru) | Способ получени рабочей жидкости дл высокопроизводительных вакуумных паромасл ных бустерных насосов | |
ES418224A1 (es) | Procedimiento para la preparacion de nuevos alquilfenoles. | |
ES378878A1 (es) | Procedimiento para la preparacion de una composicion para pavimientos flexibles. | |
ES326706A1 (es) | Procedimiento para la preparacion de n-dipropilacetato de colina. | |
NO740583L (no) | Anordning for undersøkelse av undervannsrørledninger. |