• Ningbo hualing elevator components factory

    No.175 hetou, ningbo, zhejiang, China,315113

  • Dalian Lat Laser Technical Development Co., Ltd. Beijing Branch

    The Spaces International Center Room 1702, Dongdaqiao Rd, Chaoyang District, Beijing, China,100020

    In the early 1990s,verticality and linearity of elevator guide rail were tested by suspending steel wire rope while their installation inspection. But detection in -use was a difficult thing. The founders leaders company Liu Hongyun several optics experts ...