This article introduces the component parts and the operating principle of the ball float liquidometer, and analyses the errors of its system, installation and operation.

通过讲述浮子液位计的组成和工作原理，分析其系统误差、安装误差和使用误差。

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Concerning on the problem of poor reliability and low measurement precision of traditional volumetric fuel consumption meter, a ball float fuel consumption meter is designed.

针对传统油耗仪可靠性差、测量精度低的问题，设计了一种浮球式发动机油耗仪。

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