| 摘要 |
<p>The trap comprises a frame made in one piece from flexible plastics tubing. This is wound into a flat open spiral, continued upwards as a helix to form the sides. At the top, the tubing is wound into another flat open spiral to form a centre opening. This frame is injection filled with a resin and cured, and then covered with net to provide a trap which can be compressed flat for storage. In use, a plastics neck is inserted tightly into the centre opening. This neck is removable.</p> |
