... 2. Standard parts. 3. Alloy Quick Coupling of Rubber Hose Application:Suit dry or wet shotcrete machineor other machine ... stainless steel ,carbon steel ,alloy steel, heat resistant steel ,tool steel ,brass and aluminum ,according to DIN ,EN, ... series.Process: cast, machining, turning, milling, drilling, thread cutting.Surface treatment: glass rays electrolytic polishing, coating, varnishing, bromzing. ...