4 1/2" 114.3mm. TUBES 構造管. ASTM A213.A269. JIS G3463. STAINLESS STEEL PIPES. XXS. 配管用不鏽鋼管. JIS G3459. SCH.160. SCH.20S. SCH.10S. SCH.5S. 稱呼直徑.
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