密封盖,客户:美国 材质:灰铁250 Sealing cover, customer: America, Material: gray iron 250注释:以上为我公司客户样品,本公司只展示自己的铸造与机械加工水平,但不销售客户的任何现有产品或者样品。Note: the above are samples of our customers. We only show our casting and mechanical processing level, but do not sell any existing products or samples of our customers.