→ chris238:問題在哪裡.....不是單位換算嗎?220.138.143.128 04/12 00:34
→ chris238:請愛用假設....220.138.143.128 04/12 00:35
→ chris238:除以面積等於流速...220.138.143.128 04/12 00:37
推 terranbill:密度*面積*流速 = 質量流率 可求得流速 114.42.103.233 04/12 21:15
推 robert6615:加油好嗎... 163.15.27.84 04/13 17:59