The pre cured tobacco leaves of growing and ripeness do not contain TSNA, and they are formed and accumulated during curing, aging after harvesting.
大田正常生长及成熟的青烟不含TSNA，是采收后在调制、贮存陈化过程中逐步形成和积累起来的。
2
Low viscosity resilient casting resin. Recommended for pre-filled silica formulations with low caking tendency used with amine curing system for low voltage cable joints.
低粘度弹力浇铸树脂，建议与先加入的硅微粉和胺类固化剂合用，用于低压电缆的连接。
3
The resin content, the volatile content and the pre-curing degree of the silica/phenolic resin prepreg cloth were on-line determined by near infrared diffuse reflection spectrum.