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最佳答案：Dear Sir,I’m glad that you are interested in our products.We have begun the rese
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最佳答案：PE ,a new environment friendly product which is multiply composited by Polymer M
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最佳答案：The well-known brands : maxwide,the well-known brands in ultrasonic welding indu
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最佳答案：通过对巧克力的性能及包装要求分析,我选用了马口铁制作的心形盒做为产品的内包装容器,通过金属板成型法中的冲压成型工艺制作,对产品有很好的保护性能.该产品定位为高档