The crimping process uses three sets of wheels which rotate the aluminum on to the strut to mechanically lock it into place
anti - falling
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Silver and White Extrusion Alloy Window Frame Aluminum on China WDMA bifold The crimping process uses threeSilver and White Extrusion Alloy Window Frame Aluminum Product Category Anodized Powder coating Electrophoresis Wood Grain Sandblasting Product Description Product Name Silver and White Extrusion Alloy Window Frame Aluminum Material 6063 aluminum alloy Color Anodizing Silver, bronze, champagne, titanium, nickel, golden yellow, etc. Anodizing thickness is up to 25um. Powder Coating White, black, bronze, grey, green and all color is OK Powder coating