这是啥材料
各位，这是什么材料，看着不像铁http://tiebapic.baidu.com/forum/w%3D580/sign=d408ce2189fc1e17fdbf8c397a91f67c/f169ca8065380cd70682dbdae744ad3459828104.jpg?tbpicau=2024-03-01-05_47dcde2c23b39fdc5f09c6c3789ab62ehttp://tiebapic.baidu.com/forum/w%3D580/sign=93b72125094a20a4311e3ccfa0539847/8a0449540923dd5486efde5f9709b3de9c824804.jpg?tbpicau=2024-03-01-05_6b47546a46e3e9610ba3ff66daea8330
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