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  • 瀝青脆點儀

    瀝青脆點儀是目前尚未納入規范的非規試驗，瀝青材料隨著溫度的降低，由粘—塑性狀態逐漸轉變為彈一脆性狀態，因而表面為塑性減小，脆性增大，本儀器即為低溫測定瀝青的脆點。

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日韩av网站在线免费观看_亚洲老女人视频免费_麻豆成人入口_国产一区二区电影在线观看
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