一级做a爰片性色毛片成人久久久国产一级a毛_欧美激情国产精品视频一区二区_国产精品v ,免费看亚洲一级片,亚洲精品www.,韩国情色女教师,強姦乱暴を強日本妞,快操死我，好舒服流水了，啊啊

Sales Hotline

+86-13812297748

Laser interferometer
Technical Parameters:
System accuracy: ± 0.5ppm (0 ~ 40 ℃ the entire working environment)
Laser frequency stabilization accuracy: ± 0.05ppm
Resolution: 0.001um
Measurement speed: 4.0m / sec
Sampling frequency: 50KHz
Measuring range: 0-80metres
Warm-up time: ~ 6 minutes