户外进、排风口选用的百叶风口，其结构包含防水防雨叶子及过滤网等，在气旋安全通道上产生了非常大的摩擦阻力，减少了合理自然通风总面积，如不采取有效对策，自然通风量将难以获得确保。
The structure of the louver tuyere selected for outdoor air inlet and exhaust outlet includes waterproof and rainproof leaves and filter screen, which produces very large friction resistance on the cyclone safety channel and reduces the total area of reasonable natural ventilation. If effective countermeasures are not taken, it will be difficult to ensure the amount of natural ventilation.
4)表述不符深层规定，比如别墅地下室平面图表明有自然通风立井，出路面就消退看不到;或标明“详建施”，把技术专业中间的相互配合关联变为互相取代关联;或只标明出风口总面积或规格，而不标明安裝高宽比;这些。
4) The expression does not conform to the deep provisions. For example, the plan of the villa basement shows that there is a natural ventilation shaft, and the outlet surface disappears and cannot be seen; Or mark "detailed construction" to change the mutual cooperation and correlation among technical disciplines into mutual substitution and correlation; Or only indicate the total area or specification of the air outlet without indicating the installation height width ratio; these