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向拱

向拱

向拱

1

Then , once it is in place , it is partly flooded and allowed to sink to the riverbed around the breach, making a tight seal .

一旦到位，就向拱坝内灌水使它沉到裂口周围的河床上，然后做好密封，彻底堵严缝隙。

2

The hub may be vaulted axially upward relative to the outer ends of the legs to further increase visibility of the valve .

毂可以相对于腿状物的外端成向上的轴向拱状，以进一步增加瓣膜的可视性。

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