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Original standard DVGW G 487 2009-08 in PDF full version. Additional info + preview on request

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Original standard DVGW G 488 1999-07 in PDF full version. Additional info + preview on request

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Original standard DVGW G 488 2012-04 in PDF full version. Additional info + preview on request

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Original standard DVGW G 488 E 2008-11 in PDF full version. Additional info + preview on request

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Original standard DVGW G 491 2010-07 in PDF full version. Additional info + preview on request

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Original standard DVGW G 491 2020-04 in PDF full version. Additional info + preview on request

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