The circular 300ft diameter stadium was built on 3 levels: the arena level, the second terrace level and the third terrace level for the restaurant.
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I guess it's the consistent heat that's gentle and yet very very very hot.
Unknown number of limitation for both.
This technique has been used for millennia; an example being the Olympia stadium found in Greece.
The reason lies within the climate in Malaysia because of the sunny and raining weather.