Microbiological contamination of starting materials should be minimal. Specifications should include requirements for microbiological quality when the need for this has been indicated by monitoring.
原料的微生物污染必须低。当指明该项目需要控制时，标准里要包括微生物方面的质量要求。
2
Quartz crystal microbalance test technique is widely used in monitoring non-metal material outgassing and molecular contamination condensation on sensitive system surfaces of spacecraft.
石英晶体微量天平测试技术可用于监测非金属材料出气和航天器敏感系统表面的分子污染沉积。
3
The experimental results indicate that, it can effer oil contamination classes corresponding to ISO, NAS and SAE, which meets the operating requirements of production field monitoring.