汽车轮毂PCD值是指螺栓安装孔的中心连接而成的截面圆的直径。
The Wheel PCD is the diameter of the studs from the centre of the wheel.
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。
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.
法兰螺栓口中心圆的直径的容许偏差及法兰相邻两孔极限容许偏差的应小于0.6毫米。
Permissible deviation of bolt hole circle diameter on flange and permissible limited deviation of two adjacent holes on flange shall be less than 0.6mm.
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