1·Heat flows spontaneously from the generally cooler heat-source flow into the locally cold portion of the heat-sink flow, which is the neck of a Venturi.
热量自发地从通常较冷的热源流流动到散热器流的局部寒冷的部分,其是文丘里管的颈部。
2·The hybrid flowmeter consists of a Venturi meter and an oval gear flowmeter.
组合式仪表由文丘里管和椭圆齿轮流量计组成。