| 摘要 |
<p>The play-pen for use in the open air is easily portable, and consists of an oblong strip of material which passes round four large steel support poles. The pointed lower ends of the poles jut out from the material into the ground. The top ends of the poles are joined to small pegs by guy ropes. The play-pen can be converted into a windbreak, and is closed up by a cord which passes through eyelets along the two ends of the strip.</p> |
