1) point mass
质点质量
2) variable mass-point
变质量质点
1.
A theorem on kinetic energy for variable mass-point and formula of work of recoil internal forces are given and the reason of soft-rope query is discussed.
给出变质量质点的动能定理和一对反推内力作功的表达式，并由此给出软绳问题的正确解释。
3) spot welding quality
点焊质量
1.
For the requirement of spot welding quality in automobile industry,a fuzzy evaluation system for spot welding quality was developed and the software was designed.
针对汽车行业对点焊的质量要求,制定了一种点焊质量模糊评判方案,并进行了软件设计。
4) quality ideas
质量观点
5) Solder Joint Quality
焊点质量
1.
Inspection Method on Solder Joint Quality in SMT;
SMT焊点质量检测方法
2.
Study on ANN-based Expert-system Applied to SMT Solder Joint Quality Control;
基于神经网络的SMT焊点质量专家控制系统研究
3.
According to the characteristics that SMT solder joint quality is related to its 3-D geometrical shape directly, theory of solder joint shape was put forward.
根据SMT焊点质量与焊点的三维几何形态直接相关的特点 ,提出了SMT焊点形态理论。
6) joint quality
焊点质量
1.
Influences of laser parameters on soldered joint quality,and the application and development of diode-laser soldering were also discussed briefly.
分析比较了固体激光软钎焊系统和半导体激光软钎焊系统的优缺点,介绍了采用半导体激光器作为热源用于无铅软钎焊的工艺特点和钎焊机理、激光参数对软钎焊焊点质量的影响因素,以及半导体激光软钎焊技术的应用和发展趋势。
补充资料：变质量体运动
