gb-t 1228-2006 钢结构用高强度大六角头螺栓

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Page 1: GB-T 1228-2006 钢结构用高强度大六角头螺栓
Page 2: GB-T 1228-2006 钢结构用高强度大六角头螺栓
Page 3: GB-T 1228-2006 钢结构用高强度大六角头螺栓
Page 4: GB-T 1228-2006 钢结构用高强度大六角头螺栓
Page 5: GB-T 1228-2006 钢结构用高强度大六角头螺栓
Page 6: GB-T 1228-2006 钢结构用高强度大六角头螺栓
Page 7: GB-T 1228-2006 钢结构用高强度大六角头螺栓
Page 8: GB-T 1228-2006 钢结构用高强度大六角头螺栓