| http://www.w3.org/ns/prov#value | - ng method such as stamping can be used. [0252] In the case of the elastic member 45, the flat top portion 45 b of which is slightly recessed as shown in FIG. 32, the lubricant coated on the flat top surface 45 b is prevented from spreading to the other portions of the connective hole, which makes it possible to use lubricant with lower viscosity, increasing the number of lubricant selections. [025
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