chromium-hardened 中文意思是什麼

chromium-hardened 解釋
鍍鉻硬化的
  1. Chromium - vanadium steel wire rod, wire and springs - high duty ground wire - hardened and tempered - specification

    鉻釩鋼盤條金屬絲和彈簧.高負荷地線.淬火和回火.規范
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