elliptical steel pipe drilling processing --Type:broaching, drilling, etching, milling, griding, turning --Material: stainless elliptical steel pipe drilling processing --Type:broaching, drilling, etching, milling, griding, ... turning--Material: stainless steel Material elliptical steel pipe drilling processingTolerance/precision0.01~0.002mmProduct materials Stainless steel:303/304 ...