1) main spots interval
主点间距
1.
This paper discusses the systematic error of the non-ideal thin convex lens focus measures by image between substance distance means or the conjugation means when neglect the main spots interval and ball disparity.
讨论了忽略主点间距及球差在物距像距法、共轭法测量非理想透镜焦距的系统误差。
2) spindle axis clearance
主轴间距
3) nodal pitch
节点间距
1.
The resonance frequency and nodal pitch of symmetrical three step flexural vibration holder have been calculated precisely based on Timoshenko beams theory, and the 3D curved surfaces displaying the variations of the resonance frequency and nodal pitch with the tool holder sizes have been drawn by a computer.
由Ｔｉｍｏｓｈｅｎｋｏ理论推导出对称三阶梯超声频弯曲振动刀杆的振幅分布解和谐振频率方程，并通过编制的计算机程序绘制了表示阶梯刀杆尺寸对谐振频率和节点间距影响的三维曲面。
4) distance between weld spots
焊点间距
1.
The influence of the distance between weld spots on static strength was studied by FEM in this paper.
通过对多点焊搭接构件的有限元分析，探讨了焊点间距对强度的影响，并与已有的实验结果比较，能较好的对应。
2.
The paper studied the influence of the distance between weld spots on static and fatigue strength by the experiments of multi spot welded plate,and we got the stress distribution around the weld spots by our mechanical model,it tallied with our experiment date.
通过研究多点焊搭接构件的静强度与疲劳强度，探讨了焊点间距对强度的影响，并且用弹性力学模型分析了板中焊点附近的应力状态，与实验结果能较好地对应。
5) stop spacing
站点间距
6) compaction spacing
夯点间距
补充资料：点主
1.旧俗丧礼之一。填写神主上"主"字上端之点。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条