在某些区域（主要是机场附近），受管制的空域一直延伸到距地面215米之上，而且在紧邻机场的区域，控制区域一直延伸到地表。
In certain areas, mainly near airports, controlled airspace extends down to 215m above the ground, and, in the immediate vicinity of an airport, all the way down to the surface.
在某些情形，特别是当在品牌之间有一种感觉联系的时候，这样的延伸就是成功的。
In some cases, especially when there is a perceptual connection between the products, such extensions are successful.
在某些实施例中，该加固结构沿该囊的侧表面并在该囊的上、下表面之间延伸。
In some embodiments, the reinforcing structure extends along the side surfaces of the bladder and between upper and lower surfaces of bladder.
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