سخن روز:

ys558ys

دیدن لینک ها برای شما امکان پذیر نیست. لطفا ثبت نام کنید یا وارد حساب خود شوید تا بتوانید لینک ها را ببینید.
is designed to prevent vehicles from colliding with obstacles, or to prevent wrong vehicles from entering the opposite traffic flow, which can reduce the occurrence of head-on collisions.دیدن لینک ها برای شما امکان پذیر نیست. لطفا ثبت نام کنید یا وارد حساب خود شوید تا بتوانید لینک ها را ببینید.
is a protective device installed on or around the pier to protect the bridge. Its main purpose is to avoid damage to the pier when a collision occurs, thereby preventing the structural damage of the bridge and protecting the safety of the bridge.دیدن لینک ها برای شما امکان پذیر نیست. لطفا ثبت نام کنید یا وارد حساب خود شوید تا بتوانید لینک ها را ببینید.
is a multi-specification and multi-shaped rubber product made of polymer synthetic materials such as rubber and fiber fabric through high-temperature vulcanization process for pipelines, culverts, sewage, desilting and maintenance. It is mainly used for drainage and sewage pipelines， emergency repair, and closed water test leak detection. It can quickly block water flow in different pipe diameters, planes and positions, and is an ideal tool for underground pipelines for drainage and sludge treatment.