存水弯u形弯管防气阀防臭瓣放泄弯管装存水弯于排水管等用防气阀堵住臭气使蒸气密封于管内
Water trap U-shaped elbow air-proof valve odor-proof flap drain trap water trap in the drainage pipe, etc. Use the air-proof valve to block the odor so that the steam is sealed in the pipe
以上为机器翻译结果，长、整句建议使用 人工翻译 。