B and O engineers estimate that fully heat-treated rail give 3-4 times more service life than conventional untreated steel; installation of curve lubricators will further increase service life to about 8 times.
How B and O makes rail last longer
Ry Age
Railway Age ; 151 , n 10
1961
Aufsatz (Zeitschrift)
Englisch
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Engineering Index Backfile | 1943
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