| 1. | An auxiliary ejector with as little blockage in the ducting as possible is placed behind the inlet of the diffuser duct .
一个辅助引射器，在通道中要以尽可能小的堵塞面积布置在扩压器进口之后。 |
| 2. | Extractable ventilation rubber ducting of the fire retardant
抽出式难燃橡胶导风筒 |
| 3. | V band couplings for ducting and piping . profile dimensions
导管和管道用形带连接器.外形尺寸 |
| 4. | Marine rigid and flexible ducting
船用硬质和挠性空气管道 |
| 5. | 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 |
| 6. | Glass fibre fabric for ducting
玻璃纤维导风筒基布 |
| 7. | Ducting and trunking and their accessories for underfloor electrical installations
地下电器设备用管道线槽及其附件 |
| 8. | 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 |
| 9. | 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 |
| 10. | Specification for v - flange couplings for aircraft piping and ducting - metric series
航空用管道和导管用v形法兰联结器规范.公制系列 |
