SANDWICH SYSTEM

SANDWICH SYSTEM is designed by TONRY and has obtained patent certificate,two types of Sandwich System with single yield tube and double yield tube.

This system is used for buffering and releasing the pressure of the rocks to protect the bolts from damaging and breaking. It could increase the elongation of the bolts.Especially match with cable bolts to form a high tensile strength,high elongation and high anti-shearing capacity support system.

This system is also match with Full threadbar bolt,Grooved bolt,Sharp end bolt,Slot&wedge bolt and so on.

Please contact us if more details.