| 摘要 |
<p>The flexible hose is ballasted internally so that when gas pressurised, it float partly immersed in the liq. Radially it is of capillary, gas permeable material esp. in the immersed part, the remaining upper section being opt. made impermeable to the gas. Esp. the hose is a cellulose based material more esp. fibre reinforced e.g. 'Wettex' (RTM).</p> |
