The ventilation system of childbirth shed is divided into positive pressure ventilation, negative pressure ventilation, equal pressure (or micro positive pressure) ventilation mode, and natural ventilation. Positive-pressure ventilation and equal-pressure (or micro-positive) ventilation modes apply to filtration systems, there are also negative pressure ventilation for the mode of filtration system, natural ventilation used in ᱱᱚᱶᱟ ᱴᱚᱴᱷᱟ ᱨᱮ ᱰᱤᱡᱟᱭᱤᱱ ᱨᱮᱭᱟᱜ ᱵᱮᱵᱷᱟᱨ ᱫᱚ, ᱥᱟᱱᱟᱢ ᱠᱷᱚᱱ ᱢᱟᱨᱟᱝ, ᱱᱚᱶᱟ ᱫᱚ 47Ds ᱠᱚ ᱨᱮᱭᱟᱜ ᱵᱮᱵᱷᱟᱨ ᱠᱟᱱᱟ ᱚᱠᱟ ᱫᱚ ᱱᱟᱦᱟᱜ ᱨᱮᱭᱟᱜ ᱵᱮᱵᱷᱟᱨ ᱠᱚ ᱨᱮᱭᱟᱜ ᱢᱤᱫ ᱥᱟᱫᱷᱟᱨᱚᱱ ᱫᱟᱹᱭᱠᱟᱹ ᱠᱟᱱᱟ᱾
In the case of non filtration negative pressure, according to the different ways of the air intake, but also divided into roof wind mode, curtain cooling roof into the wind mode, and roof plus the longitudinal wind of the joint mode of the curtain. The summer outdoor maximum temperature of northern cold region in China is not more than or slightly above 30℃, can adopt roof into the wind or curtain cooling roof wind mode; ᱟᱨ ᱢᱤᱫ ᱫᱷᱟᱣ ᱫᱚ https://microssions official official official official official official official ar jạruṛan jạruṛ ge jạruṛ ge jạruṛ ge jạruṛ ge lạgit̕ jạruṛ ge lạgit̕ jạruṛ ge lạgit̕ jạruṛ gạḍi (meaning, 2) ᱟᱨ ᱚᱱᱟ ᱨᱮᱭᱟᱜ ᱜᱩᱱ ᱠᱚ ᱫᱚ ᱟᱹᱰᱤ ᱵᱟᱹᱲᱛᱤ ᱢᱮᱱᱟᱜ-ᱟ᱾
