h202226 发表于 2017-3-3 00:08:14

IEC 60079-5 Edition 4.0 2015-02

Explosive atmospheres –
Part 5: Equipment protection by powder filling “q”
Atmosphères explosives –
Partie 5: Protection du matériel par remplissage pulvérulent “q”


admin 发表于 2017-3-6 16:16:56

谢谢您的分享,金币已奖励!
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