好象不是滑翔機。當時無風,它轉了好幾個圈不但不見其下降,離去時還上升許多
所有跟帖:
• 滑翔機不全靠風,山區曬熱了以後,上升氣流很強 -001- ♂ (75 bytes) () 12/11/2013 postreply 21:26:37
• 滑翔機不全靠風,山區曬熱了以後,上升氣流很強 -001- ♂ (75 bytes) () 12/11/2013 postreply 21:26:37
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