... , drilling, etching, milling, griding, turning --Material: stainless steel stainless steel process pipe elbow --Type:broaching, drilling, etching, milling, griding, turning--Material ... ~0.002mmProduct materials Stainless steel:303/304/316/412/etc Process technologyCasting, Machining, Metalworking, Sheet Metal Bending, Surface Treatment, Heat Treatment ...