gowyng 发表于 2015-7-8 16:45:35

求助ASTM E290-14

求助ASTM E290-14
求助ASTM E290-14
求助ASTM E290-14

丶骁龙丶 发表于 2015-7-8 16:45:36

ASTM E290-14
http://bbs.infoeach.com/forum.php?mod=viewthread&tid=93374&fromuid=128831

hanrunzhe 发表于 2015-10-22 16:16:22

Acoustics -- Measurement of airborne noise emitted by information technology and telecommunications equipment
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