一个有用的单位转换器可以帮助您日常计算，包括面积，密度，能源，力，长度，质量，功率，压力，速度，温度和体积的转换。
A useful unit converter can help you make the daily calculation, including conversion of area, density, energy, force, length, mass, power, pressure, speed, temperature and volume.
功能：用于汽车轮胎的压力量测，三单位转换，定时关机。
Function: For gauging pressure of automobile tyre, three-unit transfer and power off in fixed time.
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