cc523pate 发表于 2016-2-21 18:26:59

JIS B 8317-1-1999 Vapour vacuum pumps -- Measurement of performance characterist

JIS B 8317-1-1999 Vapour vacuum pumps -- Measurement of performance characteristics -- Part 1: Measurement of volume rate of flow (pumping speed)

admin 发表于 2016-2-22 15:01:26

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