短语词组短语zinc chrome coat 锌铬膜涂层zinc coat steel plate 零位板Uniformity of zinc coat 镀锌层均匀性zinc coat surface mass 锌层面质量thick zinc coat 厚锌层Zinc coat plating 镀锌performances of zinc coat 表面状态zinc coat mass 镀锌层质量;锌层质量 返回 zinc coat