specifications:(1) ISO 9001

 GB/T3683-92MT98-84

             (2) safety certification of approval for mining products

             (3) professional manufacture.

             (4) high quality and inexpensive.

Structure: rubber injection sealing empty device by inside fillet, enhance layer, middle layer, spirallayerand ext-ernal composition.

Features: rubber injection sealing empty apparatus in bear internal positive pressure,  body length changes shorter, diameter achieve expansion state to achive the hole sealing function.

Purposes: A used in coal mine coal dust and gas emissions extinction.

        B used in engineering building underground anti-seepage construction.

        C used in tunnel and underground and underwater mining for water.

        Dused in water conservancy underground exploration.