组合式仪表由文丘里管和椭圆齿轮流量计组成。

The hybrid flowmeter consists of a Venturi meter and an oval gear flowmeter.

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组合式仪表由文丘里管和椭圆齿轮流量计组成。

The hybrid flowmeter consists of a Venturi meter and an oval gear flowmeter.

youdao