【单选题】【消耗次数：1】
扩大模数是基本模数的整数倍数。水平扩大模数基数为3、6、12、15、30、60M，其对应的尺寸分别为（）。
①
30、60、120、150、300、600mm
②
300、600、1200、1500、3000、6000mm
③
3000、6000、12000、15000、30000、60000mm
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