GB/T 30950-2014 Gate opening meter

GB/T 18185-2000 Specification of reliability for hydrologic instruments GB/T 18522.2-2002 General specification for hydrometric instruments—Part 2:Referential operating condition GB/T 18522.3-2001 General specification for hydrologic instruments—Part 3:Basic performance and description method GB/T 18522.6-2007 General specification for hydrometric instrument—Part 6:Inspection regulation, mark, package, transportation, storage and operation manual GB 18523-2001 General specification for hydrologic instrument safety requirements GB/T 19677-2005 Essential technical terms and symbols for hydrologic instrument JJF 1001-2011 General Terms in Metrology and Their Definitions GB 4208-1993 Degrees of protection provided by enclosure (IP code) GB/T 4208-2008 Degrees of protection provided by enclosure(IP code) GB/T 4208-2017 Degrees of protection provided by enclosure(IP code) GB/T 9359-2001 Basic conditions and methods of enviromental test for hydrologic instruments GB/T 9359-2016 Basic conditions and methods of environmental test for hydrological instrument GB/T 50095-2014 Water-related basic terminology and symbols standard (with article explanations)