常见例句monium peroxoy-chromate ammonium perchromate 过铬酸铵ammonium peroxoy-chromate ammonium perchromate 过铬酸铵potassium perchromate 过铬酸钾ammonium perchromate 过铬酸铵sodium perchromate 过铬酸钠 返回 perchromate