对原检测方法进行了改进，使测量方便，保证了滚道尺寸、形状和位置严格控制在公差范围内。
The original measure method was changed in order to keep measure convenient and control strictly the raceway size, shape and location within the tolerance range.
铝及铝合金。冷拔棒材条材和管材。第8部分：多孔拉拔管尺寸和形状公差。
Aluminium and aluminium alloys. cold drawn rod bar and tube. part 8 : porthole tubes, tolerances on dimensions and form.
第三章：建立圆柱要素尺寸公差、形状公差、定向公差和定位公差的数学模型。
In the third chapter, mathematical model of size tolerance, form tolerance, orientation tolerance and location tolerance of cylindrical feature was established.
简体中文标题：铝和铝合金。挤压棒材、管材和型材。第8部分：带孔管材。尺寸和形状公差。
English Name:Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 8: Porthole tubes, tolerances on dimensions and form;
简体中文标题：铝和铝合金。挤压棒材、管材和型材。第8部分：带孔管材。尺寸和形状公差。
English Name:Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 8: Porthole tubes, tolerances on dimensions and form;
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