| 摘要 |
<p>The improved device comprises a container (1) which defines a tank (2) and a chamber (3) suitable for housing a support (17) for culture media (18), an externally actuated piston (12) acts as a valve to hydraulically connect the chamber (3) with the tank (2) or to seal them off from each other. The tank (2) contains a dilution and or enrichment or selective enrichment liquid introduced during the manufacture of the container (1).</p> |
