| 摘要 |
<p>The medical and dental device for examination of body cavities uses a tube (1) made of colourless transparent plastic foil which can be inflated by using a pump (5). This is folded up into a concertina shape, and the folds separate and form a circle at the tube is pumped up. The tube has several longitudinal seam welds across it, shaped so as to ensure that the smallest part of the body cavity is filled. This shape also corresponds to the length and width of the body cavities. An extension (2) allows the tube of the pump to be attached.</p> |
