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一桁, ひとけた
1. one digit, one column, the "ones" column
一位数,一列,"个位"列
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桁, けた
1. column, beam, girder, crossbeam, spar, yard
2. digit, decade, order of magnitude
柱,梁,桁架,横梁,纵梁,桅杆;位数,十进制,数量级