Coal Mining Operation - Coal Pillar Mining Locations
收藏Pennsylvania Spatial Data Access (PASDA)2026-07-10 更新2026-05-26 收录
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https://pa-geo-data-pennmap.hub.arcgis.com/maps/f5053400857d4bb68f717721edbc662c
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资源简介：
Coal Pillar Locations are pillars of coal that must remain in place to provide support for a coal mine.
创建时间：
2016-07-14
