短語詞組短語natural uranium fission chamber 天然鈾裂變室enriched uranium fission chamber 濃縮鈾裂變室natural l uranium fission chamber 天然鈾裂變室natural -uranium fission chamber 天然鈾裂變室enriched -uranium fission chamber 濃縮鈾裂變室 返回 uranium fission chamber