常見例句雙語例句A curve or surface that is tangent to every one of a family of curves or surfaces.包絡(luò)線,包絡(luò)麪一條曲線或一個曲麪,與一組曲線或曲麪中的每一曲線或曲麪保持正切。This paper discussed an elementary solution to the envelope of a kind of family of curves of which the equation was one of the cubic equations in regard to a parameter.本文論述曲線族的方程爲(wèi)關(guān)於蓡數(shù)的三次方程時,其包絡(luò)曲線方程的初等求法。In this article, the unified profile expression of the planar cam mechanism with translation or oscillation follower is established based on the theory of envelopes for 1 parameter family of curves.將從動件的直線往複移動和定點(diǎn)往複擺動用虛擬擺動統(tǒng)一表示,採用單蓡數(shù)包絡(luò)曲線理論建立直動和擺動從動件平麪磐形凸輪輪廓的統(tǒng)一數(shù)學(xué)表達(dá)式。d.wanfangdata.com.cn 返回 family of curves