| http://www.w3.org/ns/prov#value | - For example, when the dish-shaped metal spring 5 is made of SUS 301, SUS 303 or SUS 304 stainless steel, the key top 2 is made of silicone rubber or resin such as PC, PS or ABS and the cover sheet 1 is made of silicone rubber, the adhesive for the elastic adhesive section 6 may be selected from Table 1 in view of elongation set within the above-described range.
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