friction drag的用法和樣例：
例句
- In superplastic forming, bulk metallic glass has larger surface friction resistance than ordinary metal alloys.
大塊非晶合金在超塑性成形時(shí)呈現出比一般金屬材料更大的摩擦阻力。 - The conditionality between the flow rate and the pipe diameter is discussed when the friction factor is fixed.
文中還分析了在摩擦阻力系數一定的情況下，流量與管徑的制約關(guān)系。
