[ [2B]10支笔[送随机橡皮*1] ]
[ [HB]10支笔[送随机橡皮*1] ]
[ [2B]20支笔[送随机橡皮*2] ]
[ [HB]20支笔[送随机橡皮*2] ]
[ [2B+HB]各10支笔[送随机橡皮*2] ]
[ [2B]40支笔[送随机橡皮*4] ]
[ [HB]40支笔[送随机橡皮*4] ]
[ [2B+HB]各20支笔[送随机橡皮*4] ]
[ [HB]10支笔[无赠品] ]