This article describes its principle and field test methods.
本文介绍了它的原理和野外试验方法。
Many visual field test methods for the automotive rearview mirror have been applied, but most of them are too complicated and have less accuracy.
汽车后视镜视野的测试方法已有很多种，但是常规的这些方法比较繁琐，而且误差较大。
Playing field equipment - Handball goals - Functional and safety requirements, test methods.
运动场地器材。手球门。功能和安全要求。试验方法。
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