PS 1471-1980 PAKISTAN STANDARDS SPECIFICATION FOR METHODS FOR THE SOLUBILITY OF WOOL IN (A)UREA-BISULPHITE SOLUTION (B)ALKALI SOLUTION《巴基斯坦标准 羊毛分别在尿素亚硫酸氢盐溶液和碱液中溶解度的测定》.pdf

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