| 摘要 |
<p num="1"><br/><br/> ABSTRACT<br/><br/><br/> Water flow through air/water spray heads of an automatic<br/>in duct humidification and evaporative cooling system for<br/>buildings is modulated by a pneumatic control signal delivered to<br/>rear chambers of the system''s spray heads through a pneumatic<br/>signal reversing relay connected with a pneumatic signal sending<br/>line in the pneumatic control section of the system.<br/><br/> |
