hollow enclosure वाक्य

Its transmitter assembly that was surrounded by a hollow enclosure known colloquially as a " spit cup ", which would focus sound more effectively into the transmitter.
Smaller-scale inflatables ( such as pool toys ) generally consist of one or more " air chambers ", which are hollow enclosures bound by a soft and flexible airtight material ( such as vinyl ), which a gas can enter into or leave from through valves ( usually one on each air chamber ).