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31971L0318
Council Directive 71/318/EEC of 26 July 1971 on the approximation of the laws of the Member States relating to gas volume meters
OJ L 202, 6.9.1971, p. 21–31 (DE, FR, IT, NL)
English special edition: Series I Chapter 1971(III) P. 0729 - 0739
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