limestone cave

短语词组

短语

• limestone solution cave 灰岩溶洞
• limestone cave disposal 溶洞处理
• limestone cave and funnel 溶洞与漏斗
• limestone cave leak 溶洞渗漏
• hidden limestone cave 隐伏岩溶
• Especially big limestone cave 特大溶洞
• treatment of special limestone cave 特殊溶洞处理
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