“sand hill analogy”的概念、定义、翻译、参考文献-科学参考

单词	sand hill analogy
释义	sand hill analogy [`sand ´hil ǝ´nal·ǝ·jē] ^MECHANICS A formal identity between the differential equation and boundary conditions for a stress function for torsion of a perfectly plastic prismatic bar, and those for the height of the surface of a granular material, such as dry sand, which has a constant angle of rest. Also known as sand heap analogy.
随便看	piston flow piston gage piston head piston meter pistonphone piston pin piston pump piston ring piston rod piston skirt piston speed piston-type area meter piston valve piston viscometer pit pitch pitch acceleration pitch attitude pitch axis pitchblende pitch circle pitch coal pitch coke pitch cone pitch cylinder

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