chromium silicon spring steel wire 中文意思是什麼
chromium silicon spring steel wire
解釋
鉻硅彈簧鋼絲-
Chromium - silicon spring steel wire
鉻硅彈簧鋼絲 -
Standard specification for steel wire, chromium - silicon alloy valve spring quality
閥簧級鉻硅合金鋼絲的標準規范
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