double-convex 中文意思是什麼
double-convex
解釋
兩面凸-
Just as a double convex lens enlarges, so a double concave lens reduces
正象雙凸透鏡可以放大那樣，雙凹透鏡也可以縮小。 -
As a new type gear transmission, double circular arc profile bevel gearing carries out its transmission by means of meshing between convex - concave tooth profile in both of the direction of tooth trace and the direction of tooth depth, so it has advantage of high load capacity, long service life, easy forming hydrodynamic oil film between teeth as well as high quality of running - in etc. therefore, more attention has been paid to its application and research in recent years
作為一種新型齒輪傳動方式，雙圓弧弧齒錐齒輪傳動不論在齒線方向、還是在齒高方向，均為凸、凹齒廓相嚙合，因而它比一般的弧齒錐齒輪傳動的承載能力高，使用壽命長；並且在嚙合過程中兩齒面間容易形成潤滑油膜，具有良好的跑合性能，所以對它的應用和研究日益受到人們的重視。 -
Spiral bevel gear presents serials of good performance at transimision, carrying capability etc, of which klingelnber cycloid bevel gear is mostly widely used. it has its own characteristics : ( 1 ) the concave and convex flanks of the gear slot are cut at the same time continuously, this benefit to improve productivity. ( 2 ) universal double cutter heads are used which make it easier to control the tooth contact area
螺旋錐齒輪具有傳動性能優良，承載能力高的優點，克林貝格擺線錐齒輪是一種最具代表性的螺旋錐齒輪齒制，除具有一般螺旋錐齒輪的優點外還具有以下的特點: （ 1 ）採用連續分度雙面法銑齒，避免了跳齒分度，有利於提高加工精度。 -
Surrounding with the subject of minor asphere making and test, we pursued work in four side : the design, test and making of aspheric indirect ophthalmoscopy lenses, test and making of aspheric ge lens, double asphere lens testing, study on testing of refractive convex aspheric surface
本文圍繞小型非球面檢驗加工這個課題，主要做了四個方面的工作：非球面眼底鏡的設計、加工和檢驗，非球面鍺透鏡的加工檢驗，雙面非球面小型透鏡檢驗方法的探討，凸二次非球面檢驗方法的研究。 -
7. technology of double self - standing ouch, double concave - convex buckle device is in the lead at home, which can truly make pouch by one machine with multiple functions
7雙自立袋，雙凹凸扣裝置技術屬國內領先水平，真正實現了一機多功能制袋。 -
3. when = 0, we give the curve of the multiple orbit bifurcation in the parameter plane (, l ). and we prove that the bifurcation of multiple loop is a double orbit bifurcation and the curve is convex
3 、當= 0時，在參數平面上（ ， l ）給出重閉軌分支曲線並證明該重閉軌分支為二重閉軌分支，且該分支曲線是上凸的。
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