Some of China's mechanical product quality and the gap between them.

中国的一些机械产品质量和他们有差距.

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A precise mechanical product demands optimal performance, increasing reliability and better quality.

精密机械产品的发展要求具有高性能 、 高可靠性和高质量.

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Convexity - screw is usually important parts which has highly machining accuracy for mechanical product.

凸形螺杆通常是螺杆机械产品中的重要部件,要求其具有较高的精度.

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