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… Page 21.1 Interior communication circuits used for audible and visual signals and communication of information from one place to another, … when the switches are operated, until deliberately re-set after an emergency; a switch on each side of the door …
75.566
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… Avenue West Ottawa, Ontario K1R 7Y2 Canada Dear Sir: Re: Draft Railway-Roadway Grade Crossings Policy and draft Canadian Railway-Roadway Grade Crossings Standards … Warning Flashers I would like to see a maximum time of test to be the advance pre-emption time plus operation time …
74.465