... accessible porosity 外通孔 acoustic porosity 声波测井孔隙度; 声波孔隙度 active porosity 有效空隙度; 有效孔隙度; 有效孔隙率 ...
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在安装条上靠近后端的部位设置限位片，该限位片的外边缘倚靠在通孔外的底座上。
A spacing piece is arranged at the portion close to the back of the installation rod, and the outer edge of the spacing piece leans against the chassis outside the through-hole.
形成沿径向相对于中心轴隔开第二距离以限定外圆周的第二多个导电性通孔(104)。
A second plurality of conductive vias (104) is formed radially spaced a second distance about the central axis so as to define an outer circumference.
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