1. The tortuosity factor of A301 ammonia synthesis catalyst is measured using dynamic state method single pellet string reactor method (SPSRM). 采用动态法，在单颗粒线反应器中对A301氨合成催化剂的曲折因子进行了测定。
2. In addition, fractures were more common with ostial location, longer lesions, angulation, proximal tortuosity, extensive vessel calcification and total occlusion. 此外，支架断裂在开口病变、长病变、成角病变近段、扭曲病变、广泛钙化病变以及完全闭塞病变更为常见。
3. Because forest zone of mountain of the Qin Dynasty establishes ground condition poorer, landform is complex, river valley is deep-felt, tortuosity, silvan microclimate is apparent. 由于秦岭林区立地条件较差，地形复杂，河谷深切，迂回曲折，森林小气候明显。
