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… in operation of trains in main track or yard service; and any railway position engaged in rail traffic control. Any … employees qualified to serve in Safety Critical Positions; and make all such records related to this rule available to …
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… pressure for a vessel in its normal operating position at the operating temperature specified for that pressure, and includes a … of 4; 3.5 "factor of safety" means a margin of safety and is used to determine maximum allowable stress value used for …
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