... 缘海 shallow marginal sea 浅成沙矿 shallow placer 浅井 shallow well ...
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Thailand is one of main countries producing tin in the world, and its ore deposit types are the shallow-sea deposit placer tin in main.
泰国是世界上产锡的主要国家之一,其矿床类型主要是浅海沉积型砂锡矿。
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