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标题: EN 54-12:2015 [打印本页]

作者: eks 时间: 2020-5-8 14:46:59 标题: EN 54-12:2015

EN 54-12:2015
Fire detection and fire alarm systems —
Part 12: Smoke detectors — Line detectors using an optical light beam
Publication Date: 30 April 2015

作者: outman 时间: 2020-5-8 14:47:00

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