Along with the years of entrepreneurial journey of Zhongyuan people, she gradually formed her own spiritual pillar and behavioral norms. In the silent inheritance, she guided Zhongyuan Company towards a more brilliant tomorrow.
DIN 19522-1 Cas iron spigot (SML)drainpipes and fittings-dimensions
DIN 17861 Seamless circular titanium and titanium alloy tubes
DIN 17751 Nickel and nickel alloy tubes-special properties
DIN 17679 Wrought copper and copper alloy tubes with rolled fins for use in heat exchangers
DIN 17671-2 Tubes of copper and wrought copper alloys -technical conditions of delivery
DIN 17459 Seamless circular high-temperature austenitic steel tubes -technical delivery conditions
DIN 17458 Seamless circular austenitic stainless steel tubes subject to special requirements -technical delivery conditions
DIN 17457 Welded circular austenitic stainless steel tubes subject to special requirements-technical delivery conditions
DIN 17456 General purpose seamless circular stainless steel tubes-technical delivery conditions
DIN 17455 General purpose welded circular stainless steel tubes -technical delivery conditions
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