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[国外标准] UL 1666-2017 Test for Flame Propagation Height of Electrical and Optical-Fiber Cables Installed Vertically in Shafts

zthink

P:2017-06-02 17:52:45

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UL 1666-2017 Test for Flame Propagation Height of Electrical and Optical-Fiber Cables Installed Vertically in Shafts.pdf

UL 1666-2017 Test for Flame Propagation Height of Electrical and Optical-Fiber Cables Installed Vertically in Shafts.pdf

bell radius - (线模)喇叭口半径 （0） 投诉

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