SANSI tunnel lights light up 329 National Highway. Stretching 10km, Dadongdai tunnel is the longest tunnel in Zhoushan.
No.1280, Shuying Rd, Minhang District, Shanghai, China overseas@sansitech.com +86-021-54883434 +86-021-54883432 +86-021-54883445
Copyright © Shanghai Sansi Electronic Engineering Co., Ltd. ICP:05026781Powered by Sansi