试验段只有左右两壁的风洞的英文

open-floor-and-roof wind tunnel

• 试验:    experiment; test; ...
• 段:    section; segment; ...
• 只有:    only; alone
• 左右:    the left and right ...
• 两:    two
• 壁:    wall
• 的:    4次方是 The fourth po ...
• 风洞:    wind tunnel; air t ...