steam bronze 中文意思是什麼
steam bronze
解釋
汽閥青銅-
Standard specification for steam or valve bronze castings
蒸氣或閥門青銅鑄件的標準規范 -
Standard specification for bronze castings for steam locomotive wearing parts
蒸氣機車易損部件用青銅鑄件的標準規范
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