Distinctive orange handle indicates "open/close" and direction of flow at a distance.
独特的橙色手柄可以远距离指示“启闭”和流体方向。
Education has close links with social class and social flow.
教育与社会分层和社会流动有密切的联系。
It failed to close off the flow when activated just before the explosion.
它在爆炸发生前被激活，却没有成功关闭石油泄漏。
When faults close completely, fluid flow ceases.
断层完全封闭后，流体运移则不再发生。
When faults close completely, fluid flow ceases.
断层完全封闭后，流体运移则不再发生。
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