Vehicle restraint systems . crashworthy roadside features . impact attenuators 车辆约束系统.路沿防撞设施.撞击衰减装置
2.
Commercial industrial gas and or oil - burning assemblies with emission reduction equipment 装有辐射衰减装置的商用工业用气体和或燃油组件
3.
Fibre optic interconnecting devices and passive components - basic test and measurement procedures - examinations and measurements - accuracy and repeatability of the attenuation settings of a variable attenuator 光纤互联装置和无源部件.基本试验和测量程序.第3 - 14部分:检查和测量.不同衰减器的衰减装置的准确性和可重复性
4.
Fibre optic interconnecting devices and passive components - basic test and measurement procedures - part 3 - 14 : examinations and measurements - accuracy and repeatability of the attenuation settings of a variable attenuator 光纤互联装置和无源部件.基本试验和测量步骤.第3 - 14部分:检查和测量.不同的衰减器的衰减装置的准确性和可重复性
