| 摘要 |
<p>The plate comprises two separate steam delivery chambers (16,17) apertured each with a set of steam delivery holes (21). The two steam delivery chambers (16,17) are in mutual communication through a delivery conduit (35) provided with an on/off valve means (44). It thus becomes possible to either deliver steam in a distributed manner across the plate or in a concentrated manner around the tip of the plate.</p> |
