2) Shuijingkeng coalmine 水井坑井田 3) Longkeng Village of Datian County 大田县龙坑村 4) Tai Shui Hang Shaft 大水坑竖井 5) Kengbing coal field 坑柄井田 6) Datian County 大田县 1. Research on the Intra-county Economies Development of Underdeveloped Counties in Inland Mountain Areas——Taking...