Dear passengers, we now ask you to place your luggage under the seat in front of you, lift the table and backrest upright, lower the armrest, fasten your safety belt and open the window shutters.
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An office chair should be fitted with a backrest.
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When I leant back, the backrest broke and I slid off the chair.
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The backrest should conform to the natural curvature of your spine, and provide adequate lumbar support.
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英语 example sentences with "backrest"