工芸基礎知識（選択問題）20181022
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冷凍機用オイルは、他の機器用のスライドオイルや油圧油と比べて、最も大きな特徴はです。 A．粘度指数が高い B．インダクションが高い C．凝固点が低い D．抗酸化安定性が良い
C．凝固点が低い#こちらで迅速に返信#
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