淺談童軍羅馬砲製作與體驗Share The Experience of Making Roman Catapults

依國中童軍教學角度來淺談訓練式羅馬砲與趣味性羅馬砲製作與體驗
The production and experience of training Roman Catapults and interesting Roman Catapults from the perspective of junior high school teaching on scouting