| 摘要 |
<p>The package to be recovered is rendered integral with one or more balloons and kept in shape whatever the external press. by removable rims and bands, the balloons having orifices connecting them to the outside. The packages, particularly for scientific equipment, maintain their shape, the orifices allowing a controlled loss of press. from the balloons. The balloons may have either shape maintained by an internal hoop of elastic material and/or by elastic separators which may be perforated discs or helical springs. The elastic material may be of flexible polystyrene or of small inflated chambers.</p> |
