Around the building is a four-meter-wide trench, in front of which is a suspension bridge, and the bottom wall is the mixture of clay, lime and brown sugar, solid and steady.

楼四周有四米宽的护楼壕沟，门前设有吊桥通行，其底墙生土掺拌有石灰、红糖，坚固无比。

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The hysteresis direction at the optimum measuring pressure point on top wall is opposite to that on bottom wall.

风洞顶壁上最佳测压点非定常压力迟滞环方向与风洞底壁上对应最佳测压点非定常压力迟滞方向相反。

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The passage communicates with the first and second Chambers and has a groove disposed on a bottom wall of the case.

通道与第一和第二腔室连通，并且具有设置在壳体的底壁上的槽。

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The ball caromed back onto the field off the bottom of a black retaining wall just above the fence and was initially ruled in play.

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