强棉药;
Separation and Preconcentration of Trace Silver with Nitrocotton
用硝基棉富集分离原子吸收光度法测定微量银
The formulation and technology of nitrocotton organic film on the second-stage screen in two-stage series IR image converter tube are described.
论述红外二级串联变像管第二级屏工艺中硝棉有机膜的配方及工艺。
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