The results of double crystal X, ray diffraction measure of typical double barrier RTD material were given.
用X射线双晶衍射仪扫描并分析了典型双势垒RTD样品的衍射摇摆曲线；
2
PPD makes the critical radius and the potential barrier of nucleation of wax crystal increase, and makes the separation of wax from waxy oil difficult.
降凝剂提高了蜡晶析出的临界半径，增大了成核位垒，使蜡晶析出困难。
3
Crystal Stick will leave an invisible protective barrier against odor-causing bacteria on your skin.