Zk international subsidiary, xsigma corporation, releases the whitepaper for its defi protocol

Wenzhou, china, jan. 12, 2021 /prnewswire/ -- zk international group co., ltd. (nasdaq: zkin) ("zkin", "zk international" or the "company"), a designer, engineer, manufacturer, and supplier of patented high-performance stainless steel and carbon steel pipe products primarily used for...
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