そういえば…。回答がついた質問を取り消す場合って（解決済みでないもの）、コインって要りましたっけ?後、解決済みの質問を取り消した場合も、コインは減るんでしたっけ? Note that https is necessary because Opera would not deactivate history buffer for simple http webpages. If you truly can't get https and you also are prepared to ignore Opera, the best you can do Is that this: 領収証が届くのに... https://www.aeroindustrial.com/product/dron-dji-matrice-4d-con-multisensor-para-topografia-mapeo-y-construccion-inteligente-con-control/