13%的意思就是路麵升高1.3feet per 10 feet,就是tan=0.13,換算成角度的就是7度.
標誌13%的意思就是7度的坡,差老遠了
所有跟帖:
• 對頭啊,雖然我肉眼看起來就像45度的坡。 -1800800- ♂ (0 bytes) () 03/28/2009 postreply 16:05:04
13%的意思就是路麵升高1.3feet per 10 feet,就是tan=0.13,換算成角度的就是7度.
• 對頭啊,雖然我肉眼看起來就像45度的坡。 -1800800- ♂ (0 bytes) () 03/28/2009 postreply 16:05:04
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