180mins hluav taws pov thawj steel dov qhov rooj, lub qhov rooj dov ntawm lub tshuab hluav taws xob, hluav taws kub tsheb dov qhov rooj

Hluav taws kub dov shutter qhov rooj yog ib hom kev tiv thaiv hluav taws kub thiab hluav taws kub rwb thaiv tsev ntawm qhov nkag loj ntawm lub tsev, thiab cov khoom ua si ib lub luag haujlwm hauv kev tsim thiab kev siv tshuab.

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