chemical formaldehyde
滑石（镁铝合金硅酸盐或滑石粉） Talc [magnesium silicate] 化学用甲醛 Formic aldehyde for chemical purposes 化学用酵素 Ferments for chemical purposes ..
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化学用甲醛 chemical formaldehyde
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用红外光谱和其他测试方法对聚乙烯醇缩甲醛(PVFM)泡沫材料湿热老化前后力学性能、物理性能和化学结构的变化进行了研究。
The changes in mechanical and physical properties and chemical structure of polyvinyl formal (PVFM) foam caused by hygrothermal ageing tests were studied by means of IR and other measuring methods.
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