bubble cap

The trays have many holes or bubble caps (like a loosened cap on a soda bottle) in them to allow the vapor to pass through.

He tasted the fragile dampness in his nostrils, adjusted the bubble cap of the membrane over his mouth.

The new plant used "lean oil" absorption, a process that forced raw gas into contact with lean oil in chains of steel bubble caps.

To avoid the risk of priming and a carry over of saltwater into the vapour, the evaporator is divided by a bubble cap separator.

Trayed strippers can have sieve, valve, or bubble cap trays while packed strippers can have either structured packing or random packing.

So that the dam wall is not lifted up from underneath by water pressure at the base, the pressure at the foot is relieved by over 40 bubble caps (Glocken) with drainage pipes (Steigleitungen).