How to guarantee the precision of field certifier .
浅谈现场认证测试仪的精度保证。
Biohazard cabinetry class ii cabinet certification field certifier accreditation .
生物危害橱柜二级内阁认证领域的验证评审。
If any original requested document is not presented , copy of such document is required to be certified as true copy of the original by a suitable certifier such as a practicing lawyer or a practicing accountant .