4 series of products

Silicon-based, not commonly used. Some 4 series can be strengthened by heat treatment, but some 4 series alloys cannot be heat treated.

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图片ALT信息： Shaanxi Daqin Aluminum Co., Ltd
违禁词： First, best, first-class, leading, unique, king, leader, leader, extreme,
营业执照及SEO链接： Business License

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