Why straight trip regulating valve stem smaller?
为什么直行程调节阀阀杆较细？
The mattress should be stored flat and with the valve open until it is to be packed for a trip.
气垫储存的时候要放平，阀门打开，知道充气完毕。
The mattress should be stored flat and with the valve open until it is to be packed for a trip.
气垫储存的时候要放平，阀门打开，知道充气完毕。
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