spreader bar उदाहरण वाक्य

:( If the stress level is above the yield point, the fatigue life can be as low as tens of cycles, as demonstrated in the Grayrigg derailment, where the spreader bars for a switch went from " passes visual inspection " to " complete failure " in less than twelve days . )-- talk ) 02 : 50, 5 January 2013 ( UTC)