[国外标准] JIS B7420-1997 Plain limit gauges
[国外标准] JIS B0255-1998 Limit gauges for unified screw threads
[国外标准] JIS B0251-2008 Limit gauges for metric screw threads
[国外标准] JIS B0255-AMD-1-2008-E Limit gauges for unified screw threads