aluminum alloy coupling 1)material:coupling,cast iron,steel,aluminum alloy,bronze 2)product weight:from0.5kg to 200kg aluminum alloy coupling1)material:coupling,cast iron,steel,aluminum alloy,bronze2)product ... ,NC lathes, grinding machines and test facility5) Surface finish: zinc/chrome plating, sandblasting, painting, anodizing, PVC powder coating, electrophoresis6) Detailed products ...