马口火车站 Bahau railway station

裂口火山锥 [地质] breached cone

汉口火车站 Hankou Railway Station

枪口火舌 Muzzle Flash

火山口湖 [地理] Crater Lake ; Crater Lake National Park

火山口 volcanic crater ; [地质] crater

破火山口 [地质] caldera

烟囱出口火焰消除器 stack flame arrester

低平火山口 maar

怀芒口火山谷 waimangu volcanic valley