短語詞組短語coal and reserves control 煤炭儲量管理Coal mine reserves management 煤礦儲量管理prepared coal reserves 準(zhǔn)備煤量coal reserves seams 煤儲層theoretical coal reserves 煤的理論儲量coal reserves management 煤炭儲量管理world coal reserves 世界煤儲量proved coal reserves 探明煤炭儲量coal reserves calculation 儲量計算 返回 coal reserves