「Daily Sharing 4.24」潤滑油基油の分類
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基油分類 標準区分 飽和炭化水素含有量/% 粘度指数 VI 硫黄分/%（質量分率） クラスⅠ 90% 80～120
潤滑剤の基礎知識、教えていただきありがとうございます
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