nominal diameter [机] 公称直径 ; 公称通径 ; [地质] 标称直径 ; 称直径
nominal diameter of a roller 滚子公称直径
Inside Nominal Diameter 公称通径 ; 口径范围
PN Nominal Diameter 公称压力
Nominal diameter of pressure vessels 压力容器公称直径
nominal diameter of filaments 单丝公称直径
nominal diameter of roll 轧辊名义直径
Seamless & Welded Nominal Diameter 无缝和焊接公称直径 ; 无缝及焊接公称通径 ; 无缝科技焊接公称直径
The value of tightening torque is relative not only to the nominal diameter and quality class of the bolt, but also to the security of the threaded fastener.
指出螺栓联接的扭紧力矩值不仅与螺栓的公称直径及性能等级有关，还与能否保证联接可靠工作有关。
The reference standard, of convenient length, shall be prepared from a length of bar or tube of the same nominal outside diameter, material and heat-treatment as the material examined.
对比试块应从与待检材料有相同的公称外径、材质和热处理状态的棒或管上制取。
Compared to the new wheel tread, the worn tread is easy to form two-point contact nearby the depression area of the nominal diameter position of wheel tread.
与新用车轮踏面相比，测试得到的磨耗后车轮踏面在其名义直径位置凹陷区域附近容易形成踏面两点接触。
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