Respective stoppers are engaged with a jacket at positions along a longitudinal direction of an optical cable different from each other by using a plurality of the stoppers having pairs of engaging pieces arranged in parallel with each other by an interval dimension smaller than a width dimension of the jacket of the optical cable. Further, positions of engaging the pairs of engaging pieces and the jacket may be shifted from each other by a quarter periphery in a peripheral direction of the optical cable for the respective stoppers.

 
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> Wireless communication system and receiving device

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