低拱

采用镍-钴合金镀液电镀出磨低拱高磁瓦的金刚石砂轮。

The diamond wheel for grinding magnet shoe with low sagitta was manufactured by composite electroplating in Ni-Co alloy electrolyte .

复合电镀制备磨低拱高磁瓦金刚石砂轮金刚砂土和粘合剂的混合物，能铸成旋转磨石。

Composite Electroplating Manufacture of Diamond Wheel for Grinding Magnet Shoe with Low Sagitta a mixture of emery dust and a binder ; can be molded into grindstones .

一种很低的椭圆拱或尖顶拱；通常有四个中心点。

A low elliptical or pointed arch ; usually drawn from four centers .

计算结果表明：该种桥型横向刚度较竖向刚度弱，桥梁低阶以拱肋横向振动为主。

The calculation results indicate the transverse rigidity of the Bridge is fairly weak as compared to the vertical rigidity , and at the low orders , the transverse vibration of the arch ribs takes predominance .