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Tunnel Vision, Starring: The ‘Electric’ Excalibur Hydra.

Contractor Designs, Supplies & Installs a 2 hour rated passive fire protection to the new Barlow Trail Tunnel. When Silence Needs to be More Than Golden. You May Just Have To Think Out Of The Box. This Contractor Did Just That. (Zerodraft Calgary Ltd). The Electric Excalibur Hydra (by Spray Force Intl. Inc.) Quickly and Successfully Installs Fire Protection to the New Barlow Trail Tunnel in Calgary, Canada.