railway applications-rolling stock apparatus铁路应用机车车辆装置recreational crafts directive游艇earth moving machinery土方机械generic standard immunity industry通用的工业标准的抗扰度automotive directive汽车agricultural and forestry machines农林机械construction machinery 建筑机械cold test低温试验dry heat干热change of temperature温度变化damp heat湿热salt spray盐水测试degrees of protection防护等级chemicals化学品TOMUU