semiopen anesthesia 半开放式麻醉
semiopen method 半密闭式
semiopen slot 半开口槽
Semiopen greenhouse 半开放型暖棚牛舍
pre-semiopen set 预半开集
weakly semiopen sets 弱半开集
pre-semiopen L-set 拟半开集
pre-semiopen L-sets 准半开L
In this paper, concepts of Pre-semiopen sets, Sub-strong semiopen sets and Strong semiopen sets were introduced in topological space in a new way, and their relations and properties were discussed.
从一个新的角度引入了拓扑空间中的拟半开集、次强半开集、强半开集等概念，对这些概念之间的关系及其性质进行了讨论。
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