a类

• Specification of class a amendments and class b amendments
  指明a类修订及b类修订
• Class a and class b amendments to approved development proposals
  对核准发展计划作出a类及b类修订
• Specification for ceramic parts , type a
  A类瓷件技术条件
• Category a - general system development and maintenance services
  A类一般电脑应用系统的发展及维修服务；
• Type a 3a fuse not break for testing 90 minutes at fire temperature of 1000
  A类火焰温度1000试验90分钟3a保险丝不断
• Type specification for variable tuning capacitors - type a in electronic equipments
  电子设备用a类调谐可变电容器类型规范
• Standard room category a
  标准房a类
• Deluxe single room a
  A类豪华单人间
• Blank detail specification for variable tuning capacitors type a in electronic equipments
  电子设备用a类调谐可变电容器空白详细规范
• System category c - - this category comprises all syatems which do not fall into categories a and b
  C类系统一一不属于a类、 b类的系统。