| 21. | The cables were placed in ducting throughout the town, and had over 1000 subscribers.
|
| 22. | The thrust borer laid of ducting through which the mains cable was pulled into position.
|
| 23. | Ducting influence becomes stronger as frequency drops.
|
| 24. | They drop from parachutes, and climb through air vents and ducting to the lab.
|
| 25. | In the west wing ducting has been located above a lowered ceiling to the corridor.
|
| 26. | Elsewhere ducting and plant have been hidden behind walls and in sections of lowered ceiling.
|
| 27. | The passage and entrance area has a recent lowered ceiling to accommodate air conditioning ducting.
|
| 28. | This was attached to perforated ducting, which sat on the floor of the silo.
|
| 29. | Pull the outer covering and the insulation back to expose the inner sleeve of the ducting.
|
| 30. | Stainless steel ducting would be best.
|
