文章指出采用便携式超声波流量计可以实现在线大口径流量计的检测及校准，并介绍了检测步骤和检测时需要满足的条件。

This article points out that using the portable ultrasonic flowmeter can realize the large-caliber flowmeters on-line testing and calibration.

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便携式超声波流量计的超微粒子- 20，人类工程学的先进设计，以便在超微粒流行基于同样- 10，具有重大的规模缩小。

The Portable Ultrasonic Flowmeter UFP-20, based on the same, ergonomically advanced design so popular in the UFP-10, features significant size reduction.

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