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Original standard DVGW GW 129 E 2021-08 in PDF full version. Additional info + preview on request
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Original standard DVGW GW 130 2016-01 in PDF full version. Additional info + preview on request
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Original standard DVGW GW 130 E 2014-07 in PDF full version. Additional info + preview on request
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Original standard DVGW GW 133 2005-12 in PDF full version. Additional info + preview on request
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Original standard DVGW GW 134 2011-08 in PDF full version. Additional info + preview on request
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Original standard DVGW GW 14 1989-11 in PDF full version. Additional info + preview on request
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