outdoor wooden playground equipment: Certificate:GS(TUV) outdoor wooden playground equipment:1)Component:slide,deck,stairs,bridge,etc. ... environment. Technology:rotational mould 3)Material(metal):use high-quality steel, phosphatized,rust cleaned,powder coated in electro- ... environment.Technology:rotational mould 3)Material(metal):use high-quality steel , phosphatized,rust cleaned,powder coated in electro ...