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Re: Strange Acoustical Resonances Gives Current Subway Cars an R9 Bearing Whine Sound at Union Square

Posted by Q Brightliner Harry on Tue Mar 26 04:34:17 2019, in response to Re: Strange Acoustical Resonances Gives Current Subway Cars an R9 Bearing Whine Sound at Union Square, posted by randyo on Tue Mar 26 02:59:06 2019.

Thanks for the great info! However, I seem to recall the bulkhead had "QB" and presumably there was also "N" on the bulkhead roller.

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