| http://www.w3.org/ns/prov#value | - An outer diameter, a length and a form of the illuminating-light receiving portion and a form of an air receiving portion of a light-source connector portion 526 which is connected to the light source unit 503 are so formed as to be the same as an outer form, a length and a form of an illuminating-light receiving portion and a form of an air receiving portion which are provided on the connector of
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