There are different degradation mechanisms in different soils and most phosphorus are reserved in form of metal phosphates and hydroxylapatite.
磷肥在不同类型土壤中的退化机理不同，大部分磷以金属磷酸盐和羟基磷灰石的形式储存在土壤中。
2
One solution is to maintain sufficient shear to wipe the metal surfaces constantly, since most polymer degradation occurs when polymer contacts metal for too long.
一个办法是保持足够的剪切以快速清洁机筒内表面。 因为当聚合物与金属接触太长时间后会发生聚合物降解。
3
The study of the spectral reflectance degradation of Al reflective film with glass and metal substrate in space combined environment was carried out.