充气床垫;
DOES BLOWING AIR INTO THE THERM-A-REST AFFECT THE MATTRESS IN COLD WEATHER OR HIGH ALTITUDES?
向气垫里吹气影响在寒冷或高海拔地区使用 吗 ?
You have to blow up an air mattress first before ou can use it.
在使用气垫之前,你必须先把它充满气.
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