pit safe plate 底坑安全板
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The Powder House, part of the Big Pit Museum, will receive funding for a structural survey to ensure the monument is safe and accessible to visitors.
UNESCO: UK National Commission for UNESCO - Blaenavon receives Welsh government support to protect its World Heritage
The gravel-pit is not really dangerous if you don't try to climb down the edges, but go the slow safe way round by the road, as if you were a cart.
NPR: Excerpt: 'Five Children and It'
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