... 力的等效替代 equivalent and substitution of force 平行四边行定则 the parallelogram rule 矢量和标量 Vector and Scalar ...
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This model suggests that, when the relation "parallelogram rule" exists between main stem and sub branches, the total volume of branches is minimal.
该模型认为，当主干与侧枝的截面积之间存在类似平行四边形法则的关系时，分枝的体积取极小值。
The paper mainly analyses the cause of crumble, discusses the effective control of the timber crumble and the application of the rule of parallelogram in the process of manufacture.
本文主要分析崩茬的原因以及平行四边形法则在控制崩茬问题上的应用。
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