应用几种不同的湍流模型，模拟计算水力光滑管的沿程阻力系数。
Friction loss factors of hydraulically smooth pipes have been calculated by using several different turbulent models.
研制了光滑岩溶管道和裂隙交叉的水力特性室内试验模型。
An experimental installation for testing the hydraulic characteristics of intersection of smooth tubular karst passage and fissure is developed.
胶原蛋白原液给肌肤提供安定有力的支撑，维持肌肤的光滑度、锁水力和弹性，修护并补充肌肤弹力；
Collagen solution to the skin stable support, maintain skin's smooth, lock water and elastic, repair and added skin tension;
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