| http://www.w3.org/ns/prov#value | - For example, if the light guide 33 and the signal cable 45 are covered by a silicone tube and the air and water supply tube 51 and the forceps tube 61 are covered by an urethane tube, the protection members 148 are made of rubber material such as silicone rubber, EPDM rubber, fluorine rubber, urethane rubber, and so forth.
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