很一般，老是写不出来，吸水不便利，字体粗，写字卡。
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S671EF
S675F
S673F
S673M
S675
S675EF
S675EF-S675F-S676F-S676M
S675EF-S90
S676
S670F
S676EF
S676F
S676F-S676M
S676F-S91
S677
S678
S679
S672M
S672
S661
S668F0.7MM
S681-S680-S681
S681-S680-S680
S681-S680
很一般，老是写不出来，吸水不便利，字体粗，写字卡。