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| 1. | All this would naturally lead them to concentrate their pressure on us. |
| 所有这些自然使得他们把压力集中到我们身上。 |
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| 2. | lead ore concentrate |
| 铅精矿 |
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| 3. | lead concentrate |
| 精铅 |
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| 4. | A method is proposed to determine free native silver and free silver sulphide in lead-zinc concentrate |
| 拟定了分离测定铅锌精矿中游离硫化银和游离自然银的方法。 |
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| 5. | The paper describes the features of bath smelting of lead sulfide concentrate and structural characteristics |
| 论述了硫化铅精矿熔池熔炼的特点以及氧气侧吹直接炼铅炉的结构特征。 |
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