风洞

Traditional form:

風洞

Pinyin (reading):

fēngdòng

Definitions:

• wind tunnel

Characters:

• 风 - wind; air; customs, manners; news
• 洞 - cave, grotto, hole, ravine

Traditional characters:

• 風 - wind; air; customs, manners; news
• 洞 - cave, grotto, hole, ravine