[国外标准] BS 6649-1985 Specification for clay and calcium silicate modular bricks (No longer current but cited
[石油行业标准] SY/T 6649-2018 油气管道管体缺陷修复技术规范
[国家标准] GB/T 6649-1986 半导体集成电路外壳总规范
[机械行业标准] JB/T 6649-1993 锡青铜球形粉末