| 1. | Specification of class a amendments and class b amendments 指明a类修订及b类修订 |
| 2. | Gully tops class b 125 , quadratic ; particulars B 125级正方形雨水沟顶部.详细数据 |
| 3. | Marine magnetic compass of class b general specifications 级磁罗经通用技术条件 |
| 4. | Class b : rock ore appraisal and rock ore testing 68810912乙级:岩矿鉴定与岩矿测试。 |
| 5. | Gully tops class b 125 , quadratic ; summary B 125级正方形雨水沟顶部.综述 |
| 6. | Low - voltage fuses - part 11 : class a , class b fuses 低电压熔断器.第11部分: a级和b级熔断器 |
| 7. | Manhole tops , class b 125 - part 3 : covers . b125级人孔盖.第3部分:井盖 |
| 8. | Manhole tops class b 125 - part 1 : summary B125级人孔盖.第1部分:综述 |
| 9. | Class b : rock ore appraisal and testing 乙级:岩矿鉴定与岩矿测试。 |
| 10. | Class b : remote sensing geology exploration 乙级:遥感地质勘查。 |