parallel seat
... Panel lamp[light]仪表板照明灯 Parallel seat平行座椅 Parallel spline长方形花键 ...
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座椅靠背不应太斜，而应与坐垫大致垂直，驾驶人正坐时，后背大体与靠背平行。
Backrest should not be too inclined, and should be vertical, and the cushion is roughly when drivers are back roughly parallel to the back of a chair.
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