一些国家已经确立舞台与座位或观众看台周围的环，类似于摔跤或拳击舞台上，和打斗可能是整个举行一天。
Some countries have well-established arenas with seats or bleachers for spectators surrounding the ring, similar to a wrestling or boxing arena, and fights may be held all throughout the day.
最初设计于1923年，其两个横向展开气瓶就像一名拳击手的手套，冲床对方为他进入环。
First designed in 1923, its two horizontally mounted cylinders are like a boxer's gloves punching each other as he enters the ring.
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