研磨

Solid bases, quantity of acetylacetone, quantity of sodium hydroxide, and grinding time were investigated.

考察了碱的种类，乙酰丙酮的量，NaOH的量，以及研磨时间对产率的影响。

The processing of making birefringence Iceland glassy prism from calcite crystal, which included orientation, cutting, grinding, polishing, coating, testing of extinction index and so on, were described.

介绍了双折射晶体方解石的加工工艺过程，包括对双折射方解石晶体进行定向、切割、研磨、抛光、消光比的测定等。

The machine adopts transmission gear and idler wheel .which go through rubbing and heat treatment.it has high precision with long service life.

本机传动齿轮，传动滚轮，均经热处理研磨，精密度高，寿命长

So, the initial ball charge proportion is advised as large size ball 20%, middle size ball30%, and small size ball 50%, which can get good grinding effect.

因此，建议球石的大小比例为大球20%、中球30%、小球的50%作为初始配比。可达到良好的研磨效果。

Because the workpiece is in dynamic balance, the resultant moment acting on it should be zero. Introducing the moment from lapping tool and press head a moving differential equation is built. In this equation only workpiece rotating speed is unknown. It means that workpiece rotating speed can be got by this equation. Since there is a transcendental function in integral function of the equation an analytic result can not be got, only digital result can be got by a computer. Thus a change rule of workpiece rotating speed with lapping parameters is known, e.g. the radius of press disc ball socket, radius of press head ball, the distance between the workpiece rotating axis and lapping tool rotating axis, workpiece radius, modulus of elasticity of the press head and press disc, friction coefficients between the lapping tool and workpiece, and between the head and disc, pressure between the lapping tool and workpiece and pressure between the press head and press disc.

因工件处于动态平衡状态，其上所受到的来自于磨具和压头的力矩应相等，将二力矩表达式联立，建立工件运动微分方程，该方程中只有工件的旋转角速度是未知量，因此可以求出工件旋转角速度，但该方程积分式中含有超越函数，得不出解析解，只能通过计算机求出数值解，得出工件旋转角速度随各研磨参数的变化规律，如压盖球座半径、压头的球头半径、工件回转中心相对磨具回转中心的偏心距、工件半径、压头和压盖材料的弹性模量、磨具与工件间的摩擦系数、压头压盖间的摩擦系数、磨具与工件间的压强、压头压盖间的压力等。

Moreover, the powders of ammonium iron blue was obtained after filtrating, washing, drying and grinding the products.

将铁蓝过滤、洗涤、干燥、研磨得到铵铁蓝粉末。

The uncertainties for verifying all kinds of abraded straight rulers with different length on interferential installation with isoclinic circle fringe by two kinds plane optical bars were evaluated in this paper. Among the uncertainty evaluations, the situation of subsection also was evaluated.

摘 要：对不同长度的研磨平尺用两种不同长度长平晶在等倾干涉装置上检定的不确定度进行了评定，其中包括分段法不够一整段时的评定。

Numerical analysis was made on magnetic field distribution in working area of magnetic abrasive finishing by the finite difference method,and a kind of arithmetic to calculate the isodynamic was put forward.

利用有限差分的方法对磁极开槽情况下磁力研磨加工区域中的磁场分布进行了数值分析，提出了一种等磁位线的计算绘制算法，得到了加工区域磁场分布的等磁位线图。

At the same time, they have the high temperature capability to withstand race track lapping with low susceptibility to accelerated wear or judder that may afflict other cars.

同时，他们有较高的温度承受能力较低的赛道易感性加速磨损或抖动可能折磨其他汽车研磨。

Kieselguhr, used in brewing, is extremely abrasive, and can cause severe wear in conventional pumps.

硅藻土，用于酿造业，是一种很强的研磨剂，在传统的泵中能够引起严重的磨损。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！