Din 434, Din 435, Din 6917, Din 6918,..
M8~M36
天然、黒、亜鉛メッキ、溶融亜鉛メッキ、ダクロ処理、ジオメット処理
炭素鋼、合金鋼、ステンレス鋼、特殊プラスチック...
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