38622| 35
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云南石子『泛称』云子 ≈ 先有「云牌、永昌牌」后有「永子牌」 |
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点评
每一棋格『2.55 × 2.4』→ 最适(2.35)子径,永⑥号『黑2.35 ± 0.02,白 2.33 ± 0.02』最适;比赛器材要求『子径 2.30 ± 0.05』→ 这点「永子」不错!
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