| 摘要 |
<p>The bag comprises a cover of flexible material whose shape is stabilised by a substantially square core. It has at least four walls and is made of solid material more particularly plastics which is connected to the cover. The core can be readily manufactured e.g. by injection moulding, slipped into the sleeve cover and connected by rivets, welding, stitching or similar. Particularly in the case of large bags it is preferable if at least the two longer vertical walls of the core have opposing T-shaped grooves in which an insert wall can be added to prevent the walls from bulging out.</p> |
