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Guard rail
"Guard rail" in a Sentence (2 examples)
At Morez, it runs through the main street on the left, or west, side; guard rails are used only where the line crosses the main road at each end of the town.
Likewise, guard rails would have made little difference. They are fitted to the track to contain derailed wheels on the approach to tunnel portals or bridge parapets.
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Unscramble this word: guardrail