美西南航空公司——一家美国廉价航空公司的一项“乘客身型限重”政策是若乘客不能坐进有扶手的座椅中，需再购买一张机票；但如果飞机尚有空座，所购第二张机票享受退款优惠。

Us domestic no-frills airline Southwest has a "customer of size" policy that insists passengers who cannot lower both armrests buy a second ticket which is reimbursed if the flight is not full.

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