| 摘要 |
<p>Sandal conforming to the arch of the foot has a strap at the front to hold the foot and is formed from a synthetic moulded material of Shore Hardness is not 70. The density of the material is pref. between 0.8 and 1.4. Suitable materials include a mixture of synthetic crepe rubber and polystyrene, or plasticised PVC. An additional outer sole may be provided and longitudinal grooves moulded in the face. The synthetic soles are cheaper and lighter than wooden soles.</p> |
