底特律 動物園的北極 生命環設有高度工程化的丙烯酸隧道，讓遊客在寒冷的水域中漫步，在北極熊和海豹游泳時看到它們。 RPT 提供 70 英尺長 x 12 英尺寬 x 8 英尺高的隧道（21.3 米 L x 3.7 米寬 x 2.4 米 H）作為互動展覽的一部分，讓客人能夠觀賞北極圈的野生動物和人類生活環境。
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