In a known way, fill packs, and in particular honeycomb fill packs are composed of {TAIL ~ pleated or corrugated plastic layers L}, said layers being placed side by side and glued to one another to form, with the respective pleats, a series of small tubes inclined with {HEAD ~ respect} to the vertical, suitable to allow the air flow according to F1 to pass through and to offer a large contact surface with said flow 
In a known way , fill packs , and in particular honeycomb fill packs are composed of { TAIL ~ pleated or corrugated plastic layers L } , said layers being placed side by side and glued to one another to form , with the respective pleats , a series of small tubes inclined with { HEAD ~ respect } to the vertical , suitable to allow the air flow according to F1 to pass through and to offer a large contact surface with said flow
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