CRRC Dalian R&D Co. , Ltd. (CRRC Dalian R&D) is a hi-tech company founded by former China CNR Corporation Limited in a bid to quicken the improvement of the independent innovation capability of the core technology of rail transportation equipment electric traction and accelerate the pace of independent development support of core technological products. The company is chiefly engaged in the core technology research, key product development, manufacturing organization, marketing applications and laboratory testing services in the field of electric traction and control 免费不收费看污在线观看-免费看污污-免费看污污污视频软件.