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这是古代用来召集小鸟用的,用手按住或松开笛子的前端,声音就会发生变化。材料竹子工具小刀、砂纸、快干粘合剂
This is an ancient method used to summon birdies. By holding or releasing the front end of the flute, the sound will change. Material Bamboo Tools Knife, Sandpaper, Quick Dry Adhesive