久久一级毛片孕妇_国产女合集呦系列_日本东京热久久久97979797_日韩特黄特色一级毛片_AV在线激情电影

<menu id="50ga5"></menu>

      1. <li id="50ga5"><legend id="50ga5"><ruby id="50ga5"></ruby></legend></li>
        Hello, welcome to the official website of huaibei yuanli metal products co., LTD.
        服務(wù)手機TEL:13809005750
        全國統(tǒng)一服務(wù)熱線

        Service hotline:
        0561-3158099

        HOME-News-Company news
        How to choose cold-rolled steel belt manufacturer
        Release time:2018-6-28 18:31:36      Number of clicks:1575
        Different manufacturers to provide product quality is uneven, everyone in the choice of cold rolled steel belt before, must first learn to judge the stand or fall of cold rolled steel belt manufacturer, next, we learn together to learn, how to choose good cold rolled steel belt manufacturer.
        How to choose cold-rolled steel belt:
        Look at qualifications.
        Normal cold rolling belt manufacturer will have the corresponding qualifications, such as business license, only have these material, to show that is normal operation, otherwise, the small mill produced also difficult to guarantee the product quality.
        Look at the manufacturer's materials.
        Good cold rolled steel belt manufacturer in the production of cold rolled steel belt will select high-quality materials, is the basis of produce good products, good material for some bad vendors, in order to save costs, often choose inferior material, product quality is often produced this is time.
        Look at the manufacturer's process.
        The production of cold-rolled steel belt can be said to be a technical work. The quality of the process directly affects the performance of the product.
        The news that you are interested in
        The last one:What is a cold-rolled strip for
        Next:Reasonable storage of cold-rolled strip steel is important
        Quality assurance
        The good faith for this
        Professional and
        technical
        Advanced equipment
        Intimate after-sales

        We must pursue perfection, service equipment manufacturing, technology innovation and quality development