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For the training of the Commanders of troop formations and of headquarters, use was also made of the terrain boards manufactured by precisely depicting the ground form, the enemy defensive facilities and the friendly forces starting assault line. Semicircular metal hoops anchored to the ground form the framework for a protective enclosure for spectators, who sit on tiers made of concrete slabs. In pine forests, needles burned on the ground form a resin that coats soil with a waterproof barrier. |
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