rude ore
常见例句
- 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.
石英砂原鑛質量的優劣，有害襍質鉄、鋁的賦存狀態及其在各粒級砂鑛中的分佈，是決定選鑛傚果的關鍵。 返回 rude ore