minimal closed extension [数] 最小闭开拓
closed extension in a group 群内的闭扩张
smallest closed extension [数] 最小闭扩张
closed extension of linear operator 线性算子的闭延拓
closed symmetric extension 闭对称扩张
extension closed 扩张闭
St. Mary’s Clinic, which is in the compound of the Sts. Peter and Paul Cathedral in the Mongolian capital had been closed since April for the building of a new extension.
自今年四月份以来，位于蒙古首都圣伯多禄圣保禄主教座堂庭院的圣玛利诊所，因进行扩建而暂时关闭。
Slot milling with flat parts of the closed contour, the cut can not cut out part of the extension.
铣削平面零件内槽的封闭轮廓时，切入切出不能有外延部分。
It is proved that relative hereditary, relative closed transition, weak homeomorphic invariant, L-good extension are all valid.
证明了相对正规分离性是遗传的、相对闭集传递的、弱同胚不变的、L -好的推广性质。
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