| 摘要 |
<p>A pair of compact blade units are connected together at each end by a spring metal link comprising independent spring fingers 2, a lug 7 having inner guide surfaces 8 and an end wall 3 with an aperture providing outer guide edges 9, and a top wall 6. Blade support members are guided vertically by co-operating pairs of guide edges 8, 9 and spring loaded upwardly by the respective spring fingers 2.</p> |
