Then solid stone grinding long will become powder with wind

英语翻译
2.Thermal Modelling of Grinding
The finite element model proposed is based on Jaeger's model [2]; it is a 2D model and the grinding wheel is considered to be a moving heat source,see Fig.1.The heat source is characterised by a physical quantity,the heat flux,q,that represents the heat entering an area of workpiece per unit time and is considered to be of the same density along its length,which is taken equal to the geometrical contact length,l.which is calculated from the relation where a is the depth of cut and d ,is the diameter of the gringing wheel .The real contact length is expected to be large owing to the deflection of the grinding wheel and the workpiece in the contact area.Nevertheless,as a first approximation,the geometrical and real contact lengths are considered to be equal.The heat flux can be calculated from the following equation Where is the percentage of heat flux entering the workpiece,the tangential force per unit width of the workpiece,the peripheral wheel speed and the geometrical contact length.The proportion of the heat flux entering the workpiece can be calculated by a formula suggested by Malkin [3,4] for grinding with aluminium oxide wheels,as where is the energy required for chip formation,having a constant value of about 13.8 J mm-3 for grinding all ferrous materials and u is the total specific grinding energy required for grinding,calculated from where is the workspeed and,consequently,as in Jaeger's model,the speed of the moving heat source.Note that,in both Eqs (2) and (4),the value of ,is required in order to calculate the heat flux and the total specific grinding energy,respectively; it can be calculated from where is the power per unit width of the workpiece,which was measured during the testing of the different grinding wheels.Therefore,from Eqs (2)一(5),the heat flux can be calculated for every case.The kind of modelling suggested in this paper is suitable for a grinding process with a very small depth of cut,since there is no modelling of the chip.In any other case,other assumptions must be made for the chip in order to provide a valid model,since the heat carried away by the chip cannot be neglected.Furthermore,the two coef- ficients of the workpiece material that are related to temperature,i.e.the thermal conductivity and the specific heat capacity,along with the density of the workpiece must be inserted as inputs to the program.For the material used in the wheel testing,those quantities were taken from the FEM program data bank.The first two were considered to be temperature dependent.

Burce__when the car came to a grinding halt. A.had charged through it midway
B.was in the middle of charging through it.这句话选B,书上说A如果midway放在charge和through就是对的.为什么放在it后就是错的

grinding做名词是什么意思.附原句.
在房龙的《人类的故事》里看到的.
and with a great grinding of rusty old hings he separated us from the noise of the busy street and locked us into a world of new and strange experiences.

英语翻译
Open and closed circuit dry grinding of cement mill rejects in a pilot scale vertical stirred mill

milling和grinding
他们两个都是磨的意思,有什么区别呢

英语翻译
1 punch former = universal grinding fixture,used fr percision girnding of round and angular shaped parts to form punches ,EDM electrodes and core pins
,position of V block can be adjusted to bring the punches to be formed at concentric position,
2 RADIUS AND ANGLE DRESER= can be used on any type of surface grinding and tool cutter

This food processor has a special attachment for grinding coffee.这句话怎么翻译?

送分咯,英语高手帮忙翻译!~
On a cylindrical grinding machine the grinding wheel rotates between 5500 and 6500 rpm., while the work rotates between 60 and 125 rpm.. The depth of cut is controlled by moving the wheel head, which includes both the wheel and its drive motor. Coolants are provided to reduce heat distortion and to remove chips and abrasive dust.

英语翻译
The size reduction and mechano-chemical grinding in a grind-
ing media type of mill are influenced by impact,compression,shear,
and friction at all the contact points of balls in the mill.Therefore,
understanding the behavior of ball movement in the mill is very
important to identify the grinding mechanism and to produce ultra-
fine particles for developing new materials.
Stirred grinding media mill has been used as a type of an ultra-
fine grinding mill in many industries such as minerals,ceramic ma-
terials,chemical products and other materials due to its high energy
efficiency,fine and ultra-fine grinding ability,and reduced contam-
ination [1-3].The computer simulation technique for studying the
flow of granular assemblies or powders is useful especially for ob-
taining detailed results from the task in that direct experimentation
is difficult.DEM is a scheme to simulate any problem dealing with
the behavior of a discontinuous particle system by Cundall [4],who
first used this type of model to study granular assemblies.Since
then,these models have become widely applied to the simulation
of a discontinuous particle system [5].Many kinds of simulations
for the ball mill have been studied:the 3-dimensional behaviors of
ball movement in a tumbling mill [6,7],the power of a tumbling
mill [8,9],and the power of a centrifugal mill [10].However,up to
now,there has been little simulation research for stirred grinding
media mill.In the stirred ball mill,there are some stirrers and the
calculation of its consumed powder becomes more complicated to
compare with the simpler kinetics of conventional tumbling ball
mill [11,12].
The objective of this paper is to simulate the motion of grinding
media balls in stirred grinding media mill and to examine the con-
sumed power based on the micro interactive forces at all the contact
points between balls and between ball and stirrer.
我就100分了,全拿出来了.
是关于球磨搅拌机的，另：我不要翻译软件翻译出来的东东