... 1. For pipe connection 2. Standard parts. 3. Alloy Quick Coupling of Rubber Hose Application:Suit dry or wet shotcrete ... pipe conection.This is the consumption components of Shotcrete machine.Quick Coupling,coupling lathe,coupling part Casting: investment casting ,precision ... : stainless steel ,carbon steel ,alloy steel, heat resistant steel ,tool steel ,brass and aluminum ,according to DIN ,EN, ASTM, ...