>>964
http://sound-social.jp/bose_ds/ds_ceiling.html?gclid=Cj0KCQjw8YXXBRDXARIsAMzsQuXDXMUUjXo17prVvPfeXJ5B-V1rM_kVYa1VgPGVAHD7-uSAIULHLp4aAmXUEALw_wcB