The new concepts of flatness, contact area rate, dot distribution and so on are defined.
本文中对 适 印织物定义了平滑度、接触面积比、网点分配数等新概念 ；
By analyzing the contact area between the Upper Die and cylindrical solid workpiece during Orbital Forming process, an approximate formula for calculating the contact area rate is proposed.
通过对摆辗加工中摆头与圆柱实心工件接触面积的分析，给出了计算其接触面积率的近似公式。
The battery-maker's dilemma is that the recharging rate depends on the area of contact between electrolyte and electrode.
让蓄电池制造商左右为难的是，充电的速度取决于电解质与电极之间接触的面积。
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