Rolling shutter spring
- Commodity name: Rolling shutter spring
- Detailed description
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Standard Grade Technique Thickness Width Tensile Strength Color Edge GB,DIN,AISI.ASTM C50/65MN/CK50/CK60/CK67/CK70/CK75/75Cr1/SK5 ETC Hardened andtempered 1.3-3.0MM 15-300MM 29-55HRC Grey blue/Bright/Polish blue/Polish yellow Round/Slit
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