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8. Bell Prover National Standard of Gas Flow in the Range of 0.5 m3/h to 280 m3/h

the new national benchmark:

SE 8 - ECM-140-1/17-008.pdf (announcement, PDF 263 kB)

SE 8 picture.pdf

the original state standard EZKUM, which has been abolished as it is replaced by a new

ECM 140-1/00-008 - Announcement (PDF 221 kB)