forged and bored pipe 中文意思是什麼
forged and bored pipe
解釋
鍛制和鏜制管-
Standard specification for carbon and ferritic alloy steel forged and bored pipe for high - temperature service
高溫設備用鍛制和鏜加工碳素鋼管和鐵素體合金鋼管標準規范
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