燃料費調整額比較 HTBエナジー https://teinenpilife.com/about-teinenpijuutaku/kounetsuhi/202011-htbenergy/attachment/%e7%87%83%e6%96%99%e8%b2%bb%e8%aa%bf%e6%95%b4%e9%a1%8d%e6%af%94%e8%bc%83-htb%e3%82%a8%e3%83%8a%e3%82%b8%e3%83%bc