试验（刮水系统验证:静态和空气动力学试验；功能验证:频率试验、失速试验、低温试验）无需在以下特征方面彼此无差异的机动车辆类型上重复:挡风玻璃及其周围环境的形状、尺寸、表面和空气动力学特性，车辆制造商指定有助于挡风玻璃擦拭的每个系统的特性。ISO 6255对后窗进行了适当的测试。

The tests (verification of wiping system: static and aerodynamic tests; verification of functioning: frequency test, stall test, low temperature test) need not be repeated on types of power-driven vehicles which do not differ from one another in respect of the following features: shape, size, surface and aerodynamic characteristics of the windscreen and its surroundings, characteristics of each system designated by the vehicle manufacturer as contributing to wiping of the windscreen. Appropriate testing for rear windows is dealt with in ISO 6255.