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Valve on the main gas pipeline 3D work and 3D image
Easel with no entry symbol. Prohibition of actions and operations, restricted area. Ban and sanctions. Isolation zone and quarantine. Wrong direction. Failed strategy. Inaccessibility, taboo.
A no smoking sign is displayed on a clear surface.
Bridge to Ban Gioc Waterfalls, a famous cross-border waterfall between Vietnam and China

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