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我们常说的贴片电阻 (SMD Resistor)叫片式固定电阻器(Chip Fixed Resistor)，又叫矩形片状电阻(Rectangular Chip Resistors)，是由ROHM公司发明并最早推出市场的。......
灯光控制系统电路,ht Control SystemIt is easy to install a couple of infrared emitter and receiver at the entrance of y......
This is a complete alarm system with 5 independent zones suitable for a small office or home environment. It u......
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dolphin 2012-07-31
dolphin 2009-07-06
