In the laboratory, when the seal dives below the surface of the water and stops breathing, its heart beats more slowly, requiring less oxygen, and its arteries become constricted.
在实验室里，当海豹潜入到水面以下并停止呼吸时，它的心脏跳动得更慢，需要的氧气更少，动脉也会收缩。
First, the water pump mechanical seal ring on the surface of metal corrosion.
第一，水泵的机械密封上金属环表面均匀腐蚀。
The Steel Finger type expansion joint system shall seal the deck surface, gutters and curbs in accordance with the plans and prevent water from seeping through the joint area.
钢梭型伸缩缝系统按照平面图对道路表面、路槽及路缘进行密封，防止水渗流通过缝隙区域。
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