| 摘要 |
<p>A treatment system for aerating, cooling and heating or draining a site such as a golf course green or a playing field (10). A mobile blower (40) can be connected and disconnected with an underground duct network (16, 17) situated under the site through a suitable valving arrangement operating as shown in Figs. 3 and 4 so that one blower can be used in serving a number of sites.</p> |
