| 1. | Six - angled screw six - angled flange - faced screw 外六角螺丝 |
| 2. | Nonmetallic six - angled locknut with component embe six - angled flange - faced nut 非金属嵌件六角锁紧螺母 |
| 3. | Ducting for ventilation equipment ; flanges ; series 1 ; angle flanges 通风设备用管道.法兰.系列1 .角钢法兰 |
| 4. | Six - angled flange - faced nut 六角法兰面螺母 |
| 5. | Ducting for ventilation equipment ; flanges ; series 3 ; flat and angle flanges 通风设备用管道.法兰.系列3 .平面法兰和角钢法兰 |
| 6. | Ducting for ventilation equipment ; flanges ; series 2 ; flat and angle flanges 通风设备用管道.法兰.系列2 .平面法兰和角钢法兰 |