There are two types of relaxation: longitudinal relaxation, which is the time (T1) needed to align protons in a static magnetic field;
有两种类型的驰豫：纵向驰豫，静磁场中质子定向排列所需的时间T1；
The result shows that sag resistances of the tubing resins have a close relationship with NMR relaxation properties. Resins with longer longitudinal relaxation time possess better sag resistances.
管材树脂的抗熔垂性能与其核磁迟豫特性紧密相关，好的抗熔垂性能对应更长的纵向迟豫时间。
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