extension fuzzy number可拓模糊数

extension complex number可拓复数

extension real number可拓实数

extension interval number judgement matrix可拓区间数判断矩阵

Please Dial Extension Number请分机号码

supposed extension number假设扩展数值

Restricted extension number分机限用号码

extension set connection number可拓集联系数

Extension number before the分机号码可以先不填