| 摘要 |
<p>A humidifier drum construction having two spaced rigid circular end pieces and at least one unitary circumferentially disposed connecting piece therebetween, each connecting piece having an elongated flexible rail element and a plurality of rigid spaced rung elements thereon, whereby during drum fabrication the rail element can be flexed from the flat to a curvature smaller than the circular end pieces and the rung elements can be fitted transversely to and secured between the end pieces.</p> |
