That nonferrous metal deposits usually associated with silver is a common phenomenon, and this kind of deposits constitute the main part of silver mineral resources in China.

有色金属矿床伴生银是一种十分普遍的现象，在中国则构成为银矿资源的主体。

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This paper studied the new method of deep drawing of cold rolling steel-metal part and the die structure. And it also proposed the strength calculation method of main die component.

研究了冷轧薄钢板零件的深拉伸新方法和模具结构，提出了模具主要元件的强度计算方法。

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Main product: Packing aluminum metal alloy mould Knife mould mechanical series Electronics nicety washes mould Precision testing machine Precision part.

公司主要产品：吸塑铝合金模具；刀模机械系列；电子精冲模具；自动化机电设备；精密检治具；精密零件。

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