基本解釋[地球科學]砂鐵礦英漢例句雙語例句A key to ore dressing of quartz sands includes rude ores of high or low quality, occurrence and distribution of detrimental impurity such as iron and aluminium in size grades of placer deposits.石英砂原礦質(zhì)量的優(yōu)劣，有害雜質(zhì)鐵、鋁的賦存狀態(tài)及其在各粒級砂礦中的分布，是決定選礦效果的關(guān)鍵。iron placer更多例句詞組短語短語placer iron 砂鐵placer r iron 砂鐵iron placer更多詞組專業(yè)釋義地球科學砂鐵礦