1、
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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2、
In this paper both lead borate sealing glasses and lead free phosphate sealing glasses are studied.
本文研究了含铅的硼酸盐封接玻璃和无铅磷酸盐封接玻璃。
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