An implant is a plasma black hole with an approximate diameter similar to the diameter of an electron (10-17 meters).
负面植入物是电浆型态的黑洞。每个黑洞的直径约为一个电子的大小(10的负17次方公尺)。
This paper introduces the approximate calculation of components and compound section of vertical vessel lug support with stiffening ring and the selection of anchor bolt circle diameter.
介绍了立式容器壳体刚性环耳式支座构件及组合截面的近似计算过程，并对地脚螺栓中心圆直径的选择作简要分析。
An approximate method for calculating the elastic stresses at the squeeze at the squeeze corner sections of an identical diameter Tee branch pipe connection under internal pressure was presented.
针对石油化工行业大量采用的等径挤压三通，提出了一个计算内压载荷下的纵向平面内挤压圆角处各应力分量的近似方法。
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