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GB/T 17142-2008 Information technology - Open systems interconnection - Systems management overview (USD) via email in 1-5 business day VALID
YD/T 3279-2017 Specification for carrier network aware P2P traffic optimization—Network matching server discovery protocol via email in VALID please email coc@codeofchina.com for quotation
GB/T 17176-1997 Information technology--Open Systems Interconnection--Application layer structure via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
YD/T 2028-2009 General technical specification for keyword-based internet addressing via email in VALID please email coc@codeofchina.com for quotation
GB/T 20518-2006 Information security technology - Public key infrastructure - Digital certificate format (USD) via email in 1-5 business day ABOLISHED
GB/T 19771-2005 Information technology--Security technology--Public key infrastructure--Minimum interoperability specification for PKI components via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/Z 19717-2005 Secure message interchange based on Multipurpose Internet Mail Extensions via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 19713-2005 Information technology--Security techniques--Public key infrastructure--Online certificate status protocol via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 18219-2000 Information technology Reference model of data management (USD) via email in 1-5 business day ABOLISHED
GB/T 31455.4-2015 Intelligent system of bus rapid transit—Part 4:Technical requirements of depot/platform control system and peripheral equipment (USD) via email in 1-5 business day VALID
GB/T 20851.3-2007 Electronic toll collection—Dedicated short range communication—Part 3:Application layer via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
SJ/T 11271-2002 Digital domain name specification (USD) via email in 1-3 business day VALID
GB/T 17143.2-1997 Information technology--Open Systems Interconnection--Systems Management--Part 2: State management function via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 17175.4-1997 Information technology--Open Systems Interconnection--Structure of management information--Part 4: Guidelines for the definition of managed objects via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 16264.7-2008 Information technology - Open systems interconnection - The directory - Part 7: Selected object classes (USD) via email in 1-5 business day VALID
GB/T 20851.3-2019E Electronic toll collection—Dedicated short range communication—Part 3:Application layer (USD) via email in 1-8 business day VALID
GB/T 17545.1-1998 Information technology--Open systems interconnection-- Connectionless protocol for the association control service element--Part 1:Protocol specification via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 20851.3-2019 Electronic toll collection—Dedicated short range communication—Part 3:Application layer (USD) via email in 1-5 business day VALID
GB/T 16687.1-2008 Information technology - Open systems interconnection - Connection-oriented protocol for the association control service element - Part 1: Protocol specification (USD) via email in 1-5 business day VALID
GB/T 31540.4-2015 Intelligent system of bus rapid transit—Part 5:Interface specifications between dispatch center and on-board information terminal (USD) via email in 1-8 business day VALID
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