Ge - SiO _ 2 nanometer semiconductor particle thin films is applied widely in luminescence , laster, photo - switch, photo - communication etc.

Ge -SiO _2纳米半导体颗粒膜在发光、激光 、 光开关 、 光通信等方面的应用极为广泛.

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The photo switch prevent bumping when approaching to the end . Remote control within 50 meters.

采用光电无触点开关, 可自动停止,无撞击之虞,采用遥控控制,50米内库门自动遥控开关.

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