lower envelope principle
... 下半连续性||lower semi-continuity 下包络原理||lower envelope principle 下导数||lower derivative ...
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首次建立了双自由度运动状态下，用环面砂轮包络加工圆柱蜗杆传动的啮合原理数学模型。
A new method is proposed, in which a cylindrical worm is ground by a dressing gear under the condition of two degrees of freedom movement.
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