| 摘要 |
<p>The support stand holds sheets of paper in position inside a treatment vessel, particularly for developing . It has a variable number of arms, at adjustable distances apart, holding the sheets in contact with the inside walls of the vessel, so that they cannot move at any time during the treatment operation. It can incorporate a hollow central tube through which water for rinsing is delivered. The arms have opposed stops to hold the sheets between them with a slight curvature.</p> |
