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        Alibaba.com offers 7,509 def products. About 19% of these are nitrogen fertilizer, 17% are loose gemstone, and 12% are urea. A wide variety of def options are available to you, such as urea, coupling, and ammonium nitrate. You can also choose from prilled, granular, and liquid. As well as from controlled, quick, and slow. And whether def is polymer, or sulfur. There are 7,390 def suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Turkey, which supply 94%, 2%, and 1% of def respectively. Def products are most popular in North America, Southeast Asia, and South America. You can ensure product safety by selecting from certified suppliers, including 1,118 with ISO9001, 521 with ISO/TS16949, and 348 with Other certification.
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