| 摘要 |
<p>PURPOSE: To lessen the deformation, shaking, etc., of element pieces constituting respective plates and to maintain the good parallel spacings therebetween by adopting so-called paper elements and adequately adapting these elements to throw-away specifications. CONSTITUTION: Respective element pieces 10, 20 are held in spacing maintaining holders 8 having recessed parts 81 and projecting parts 82 having the width corresponding to the inter-plate spacings in the parts to be provided with first and second band-shaped connecting pieces 71, 72 to directly determine the inter- plate spacings, by which the parallel spacings between the respective element pieces 10, 20 are well maintained.</p> |
