环境试验方法光学和光子学 第12部分:污染
Optics and photonics-Environmental test methods Part 12:Contamination
Optics and photonics-Environmental test methods Part 12:Contamination
Optics and photonics-Environmental test methods Part 2 :Cold, heat and humidity
Optics and photonics-Environmental test methods Part 11: Mould growth
Optics and photonics-Environmental test methods Part 1:Definitions, extent of testing
Automatic rail-weighbridges
General technical specificationfor electronic crane and hanging scale
Spring dial scale
Surface imperfections of optical elements
Rotating-element current-meters
Instruments for stage measurement-Part 5 : Electronic gauge