| http://www.w3.org/ns/prov#value | - In this example, a light-emitting element 13, such as a light-emitting diode or the like, is disposed at a side wall 12 a of a housing 11 accommodating the protection sleeve 3, and a photoreceptor element 14, such as a photodiode or the like, is disposed at a side wall 12 b on the opposite side to detect the placement and removal of the fusion spliced portion 2.
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