国产精品一区二区不卡的视频,欧美高清成人,在线精品视频免费观看,国产精品丝袜,亚洲综合干,国产精品久久亚洲不卡动漫,久久免费国产精品一区二区

Tolian successfully developed a new kind of mould system cooperated with China Tiesiju Civil Enginneering Group Co., Ltd.  This set of utility tunnel  mould system has the advantages of high precision, high reliability, and  operability.

The mould is composed of bottom mould, side mould, end mould,  internal mould and setting system. During the manufacturing, two sets of moulds will share one internal mould to save time and working place.