三菱官方旗舰店 MITSUBISHI PENCIL 9800DX 三菱专业绘图素描铅笔 软化杉木石墨结晶20种规格色阶准确 量贩装 UBISH,I PENCIL CO.,LTD.JAPAN 980 B CO.,LTD.JAPAN 9800 9800 2B 9800 HB H 7B 9800 5H 9800 APAN 9800 3B 9800 9800 7H 980, 2H 8B APAN 9800 4B 9800 3H 6H 9800L 9800 9B 9800 APAN 9800 5B 9800 8H 9800 4H 10B APAN 9800 6B 9800