| 摘要 |
<p>Individual resilient tongues carry relief characters at one end, and are connected to a support at the other end. The tongues consist of a first material having a first modulus of elasticity, and the support consists of another material having a second modulus of elasticity differing from the first. Specif. the first material is steel and the second material plastics, pref. a non-thermoplastic material, obtained from polyester and isocyanate.</p> |
