背部支撑；靠背垫
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背部支撑；靠背垫；背部支撑；靠背垫
a support for the back, especially a backrest or cushion used while sitting
She bought a back support for her office chair.
她为办公椅买了一个靠背垫。
背部支撑；靠背垫
a support for the back, especially a backrest or cushion used while sitting
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