观察口；炮眼；舷窗；舱口；汽门；通道口的英文

porthole

• 观察:    observe; watch; su ...
• 口:    mouth
• 炮眼:    porthole; borehole
• 舷窗:    porthole; scuttle; ...
• 舱口:    hatch; hatchway; p ...
• 汽:    vapour steam
• 门:    entrance; exit; do ...