all kinds of door viewer

Description

Beijing oupuoptic instrument co.,ltd. was founded in ***1, which is located in Tongzhou District of Beijing. We have advanced technologies and equipments, hardworking and ambitious managers, technicians with innovative spirit as well as skillful production workers. We have created a series of high-quality products based on scientific management and the enterprising spirit of ceaseless pursuit of brilliant and perfect products. There are five series of products now we can offer with more than **0 kinds of products.