The unique relief valve construction incorporates two channels: one for air, one for water.
独特的安全阀结构，具有两个渠道：一个用于空气，一个用于水。
Bend flow is a common phenomenon of water movement in channels and river course.
弯道水流是渠道和河道中常见的一种水流运动现象。
Bend flow is a common phenomenon of water movement in channels and river course.
弯道水流是渠道和河道中常见的一种水流运动现象。
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