| 摘要 |
<p>The distance between adjacent grooves (Gr) in an outer cover (24), and the distance between each of recessed sections and each of the grooves (Gr) match the distance between side walls of an upper case (142) of an optical module (14), thereby minimizing a required Y-coordinate axis direction length of the outer cover (24) having inner covers (201, 202, 203, 204) fitted inside thereof, a required Y-coordinate axis direction length of a receptacle cage (12), and a pitch of compartments (121, 122, 123, 124).</p> |
