压力表是指各种类型的压力计。这些是用于测量和显示气体或液体等介质压力的仪器。大多数工业应用都使用压力计来测量相对压力：相对于环境压力的压力。此外，用于绝对压力或差压的压力表在工业环境中很常见。

　　原文：

　　The term pressure gauge refers to the various types of manometers. These are instruments used to measure and display pressure of a medium like gas or liquids. Most of all industrial applications use manometers to measure relative pressure: Pressure relative to the ambient pressure. Furthermore, pressure gauges for absolute or differential pressure are common in industrial environments.