New hyperbaric chambers with FDA clearance or ISO certifications have a tendency to cost more but give increased safety and belief. The sphere of undersea and hyperbaric health-related exploration is critical in developing the benchmarks and tips for hyperbaric chambers. ベストアンサー：個人的見解は既に幾つかの回答が出ていますので、別の視点として常用漢字表での読み方を調べてみました（... https://philipr678jsa1.plpwiki.com/user