| 1. | Tdc air ductwork fabrication
风管加工流水线 |
| 2. | Ventilation for buildings - ductwork - measurement of ductwork surface area
建筑物通风.管道系统.管道系统表面积的测量 |
| 3. | Ventilation for buildings - ductwork - measurement of ductwork surface area
建筑物通风.管道系统.管道系统表面积的测量 |
| 4. | Ductwork sound attenuators
管道声音衰减器 |
| 5. | Discussion on safety factors and countermeasures treatened natural gas ductwork of city
威胁城市天然气管网安全的因素及对策 |
| 6. | Ventilation for buildings - ductwork hangers and supports - requirements for strength
建筑物的通风.管道悬吊装置和支架.强度要求 |
| 7. | Ventilation for buildings - ductwork hangers and supports - requirements for strength
建筑物通风.管道悬吊装置和支撑物.强度要求 |
| 8. | Ventilation for buildings - ductwork - dimensions of circular flanges for general ventilation
建筑物通风.管道作业.一般通风用圆法兰 |
| 9. | Ventilation for buildings - non metallic ducts - ductwork made from insulation ductboards
建筑物通风.非金属管道.绝缘制管板制成的管道 |
| 10. | Ventilation for buildings - ductwork - strength and leakage of circular sheet metal ducts
建筑物的通风.管道系统.圆薄金属管道的强度和泄漏 |
