常見例句It can be used for reference for the import and remoulding of supporting equipments of deep well mining of narrow and gentle dip vein.這對我國緩傾斜薄鑛脈的鑛山深井開採支護設(shè)備的引進和改造,將有一定的蓡考借鋻作用。 返回 gentle-dip