隆电子科技有限公司（前身为北京长城电子厂）是一家专业开发、生产、销售电梯紧急通讯报警系统及电梯工业控制部件的高科技公司。我公司的产品用户遍及全国二十七个省、市、自治区，在上海等地设有分公司，与各专业电梯厂商建立了长期的合作关系。 Beijing Keyuanlong Electronics CO.,LTD is a high technical company specialized in development, produce and sale of elevator emergency communication alarm system and elevator industry control component. Our client are all over CHINA and we have representative Shanghai, we also establish long-term cooperative relationship with m （全文请 查看更多）