长春道扬科技是一家研发生产光电类传感器的公司，主要产品有光电编码器、光栅尺、电梯控制柜。 　　Changchun advocates the science and technology is researches and develops the production electro-optic class sensors company, the main product has electro-optical encoder, the diffraction grating ruler, the elevator control cubicle. （全文请 查看更多）