Metal hydroxides like aluminium trihydroxide (ATH) or magnesium dihydroxide (MDH) are commonly used halogen-free flame retardants in polyolefins.
金属氧化物如氢氧化铝（ATH）或氢氧化镁（MDH）是常
的无
。
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玫瑰（上） Right in the midst of this half-sad, half-sentimental reverie, she heard a familiar voice behind her say earnestly: " And allophite is the new hydrous silicate of alumina and magnesia, much resembling pseudophite, which Websky found in Silesia" .
就在这种半是悲伤、半是感伤遐想中，她听到身后
声音恳切地说：“异镁石是种新氧化铝和氧化镁含水硅酸盐，很像韦伯斯基在西里西亚发现假晶石。”
