Nam Wan Tunnel portal retaining wall.
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Blast doors to muffle the sounds of blasting during the Nam Wan Tunnel... -
Inside the westbound tunnel. -
Tunnel ventilation jet fan. -
Smoke extraction vents being installed. -
Installation of vitreous enamel panel supporting frame. -
A computer-generated image of the Nam Wan Tunnel portal. -
Construction of the Nam Wan Tunnel and motorway. -
Nam Wan Tunnel portal retaining wall.