青年中文s b na的意思
s b na中文翻譯：
s b不適用
雙語使用場景
modifying elements used in hypoeutectic Al Si alloys, besides Na, there are also Sr, Te, Ba, Sb, K, RE, B, S, etc.───共晶鋁硅合金的變質元素除鈉以外，還有鍶、碲、鋇、銻、鉀、稀土、硼、硫等。其中，應用較多的是含鈉和鍶的變質劑。
英語使用場景
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