| 摘要 |
<p>The invention provides a free-standing plastic indoor livestock confinement system, comprising at least one hollow plastic panel that defines a door frame, the door frame being U-shaped so that it is open at the top of the door frame and having an attachment for a door at one vertical edge of the door frame, and further comprising a reinforcement inside the panel that extends across a bottom threshold of the door frame with upright sections that extend up sides of the door frame.</p> |
