| 1. | Closure systems for use with rigid air ducts
同刚性风管一起使用的密闭系统 |
| 2. | Air ducts are a new area of growth for polyamides
排气管是聚酰胺开发中的一个新领域。 |
| 3. | Direct calculation method of air duct frictional resistance
风管摩擦阻力的直接计算方法 |
| 4. | Two floors up you ' ve got an air duct
往上两层，你会到达一个通风管 |
| 5. | The standard for safety for factory - made air ducts and air connectors
厂制风管和风管接头的安全标准 |
| 6. | Factory - made air ducts and air connectors
厂制风管和风管接头 |
| 7. | There ' s 6oo air ducts running to the surface . - what about video ?
还有600多条水管. -那些录影机呢? |
| 8. | Methods of testing hvac air ducts
Hvac空气管道的试验方法 |
| 9. | Determination of leakage rate and specific resistance for mine air duct
矿用风筒漏风率和风阻的测定方法 |
| 10. | Closure systems for use with flexible air ducts and air connectors
同柔性风管和风管接头一起使用的密闭系统 |
