Most parlors have outer doors with peepholes, and some have closed-circuit security cameras, gamblers say.

大部分麻将馆都装了带窥视孔的外门，有的有闭路保安摄像机，赌客们说。

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Bosses have been more careful about whom they let in; most parlors have outer doors with peepholes, and some have closed-circuit security cameras, gamblers say.

老板们对来客更小心；大部分麻将馆都装了带窥视孔的外门，有的有闭路保安摄像机，赌客们说。

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Meeting as Tatsu was founded in February 2006, is specializing in the production of closed-circuit system security products manufacturers.

汇视达公司成立于2006年2月，是专业生产闭路系统安防系列产品的厂家。

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Think of a closed-circuit security camera that watches a store entrance all night.

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