British Standard BS6349
British Standard Code of Practice
British Standard Fine Thread
British Standard Specification
英国标准规格
英国标准规范
英国技术标准规范
英国标准规范英国技术标准规范
英国标准规范英国标准技术条件英国技术标准规范
British Standard Thread
British Standard Time {= BST}
British Standard Wire Gauge
英国标准线规
英国标准线规英国标准线径规
英国标准线径规
standard standard of vo|
95th standard project standard
Standard addition method and internal standard method
standard of aroma type and standard sample
branch pipe welded directly to the run pipe
copper pipe and aluminum pipe