基本解释：外直和
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This paper introduces the direct sum in BCI-algebras, and proved the direct sum and interior direct sam are equivalent in well BCI-algebras.本文在BCI-代数中引入直和的概念,在优BCI-代数中,证明了外直和与内直和是等价的。
Supernormal recession of external rectus in the treatment of adult with intermittent exotropia;超常量外直肌后徙治疗成人间歇性外斜视
Objective To compare suspending and recession of external rectus with over-routine-quantity reces- sion of external rectus in treatment of large angle exotropia and observe the clinical effect.目的探讨大角度外斜视行外直肌悬吊后徙术与外直肌超常量后徙术的比较,观察手术效果。
Suspending and recession of the lateral rectus of large angle strabismus.;外直肌悬吊后徙术矫治大角度外斜视
U-group, the group of units modulo n is a commutative multiplication group, it provides a convenient way to illustrate the algebraic ideas of groups and to clarify the distinction between internal and external direct products.模n整数U -群是一类重要的交换乘群,它为我们更好地表述群的类似外直积与内直积相互关系的一些代数特征提供了极其简便的方法。
