Wenzhou Zhongtou Valve Co., Ltd: Professional valve pipe fitting flange manufacturer, we have our casting and forged factory and had been exported to more than 30 countries, good quality&large
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HONGTU is one of the most professional air conditioning tools manufacturers and suppliers in China, featured by quality products and good service. Please feel free to buy customized air conditioning
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A permanent bar magnet is a bar-shaped material that has a magnetic field that does not diminish or disappear over time. These magnets are made of a variety of materials, such as neodymium, samarium
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Shandong Guansong Industrial Co., Ltd: One of the leading FIBC, big bag, jumbo bag manufacturer and packaging solution expert in China. We are proud of manufacturing high quality standard big bag,
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Pingyang Shancheng Bag Co.,Ltd: Welcome to wholesale bulk cheap suit bag, cotton bag, polyester bag, cooler bag and apron made in China here from professional manufacturers in China. Our factory
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Scenker Biological has been specialized in the field of clinical microbiology, animal health, women's health since 2001. Coming in good performance, our product is good in bacterial infection,
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Winpower Technology Limited: Take power anywhere with the multifunctional portable power station!Win Power is professional in manufacturing power station, power bank, wireless chargers, earbud and
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Shandong Shengyang Machinery Co., Ltd. We specialize in production Automatic ring rolling machine Internal special-shaped ring rolling machine vertical type ring rolling machine Horizontal ring
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Shanghai Xinyiheng Metal Products Co., Ltd.: Find professional carbon steel, galvanized steel, color coated steel, stainless steel, aluminum alloys manufacturers and suppliers in China here! Please
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Shandong Zkseasy Intelligent Technology Co., Ltd: We're professional servo motor, servo motor attachments, micro servo motor, integrated servo motor manufacturers and suppliers in China. Please rest
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General guidelines (back to top). Cataloguing can't be learned in a day. Dewey is not a perfect system; not all books fit neatly into a single number; Some books can legitimately be catalogued in several numbers; choose the one most appropriate to the curriculum and the conditions in your institution