The features for each version in models 81, 82, 84 and 85 are consistent between models (i.e., the 81FS, 82FS, 84FS and 85FS all have similar features).
81型、82型、84型和85型提供的每個版本的特徵都有一致性的（即是81FS型、82FS型、84FS型和85FS型都具有類似的功能）。