工芸基礎知識（選択問題）20181021
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R22冷媒は材料に腐食作用を及ぼします。 A．銅合金 B．亜鉛メッキ金属 C．クロロプレンゴム D．天然ゴム
B．亜鉛メッキ金属#こちらで迅速に返信#
R22冷媒はB材料に腐食作用を及ぼします。 A．銅合金 B．亜鉛メッキ金属 C．クロロプレンゴム D．天然ゴム
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