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ENGLISH 好的小鬼翔太Julia(1.) Name the different departments of an engineering establishment.(2.) What does the engineering establishment include?(3.) What does the commercial department include?(4.) The foundry department?(5.) The forging department?(6.) The fitting department?(7.) What does the term shop system mean as generally employed?Examining machines made by the best designers, it will be found that their dimensions bear but little if any reference to calculated strains, especially in machines involving rapid motion. Accidents destroy constants, and a draughtsman or designer who does not combine special and experimental knowledge with what he may learn from general sources, will find his services to be of but little value in actual practice.They told this, while we were waiting on a couple of protruding boards of the pontoon-bridge, so as to allow some extremely wide carts to pass. Once again shells exploded, a couple of hundred yards behind us, and one made a hole in the bank quite near.
Assuming, for example, that a machine will cost as much as the wages of an attendant for one year, which is not far from an average estimate for iron working machine tools, and that interest, wear, and repairs amount to ten per cent. on this sum, then the attendance would cost ten times as much as the machine; in other words, the wages paid to a workman to attend a machine is, on an average, ten times as much as the other expenses attending its operation, power excepted. This assumed, it follows that in machine tools any improvement directed to labour saving is worth ten times as much as an equal improvement directed to the economy of first cost.66And by my side stood officers and soldiers raging and cursing. To them came the returning men, blood running along their faces from insignificant wounds, and they bawled and bellowed, and thundered with a thousand curses that they wanted to go back and try again. How ghastly they rolled their eyes in frenzied excitement! Some pointing at me asked the officer who I was, and he explained. Then I had to listen to endless imprecations against the civilian population of Belgium, who, according to them, consisted entirely of francs-tireurs, who all of them deserved to be shot, and to have their61 houses burned down. To repeat the coarse words which they sputtered out in their rage would only cause disgust.
To attain a double effect, and avoid the loss pointed out, Mr Ramsbottom designed what may be called compound hammers, consisting of two independent heads or rams moving in opposite directions, and acting simultaneously upon pieces held between them.Other soldiers kept on running into the burning houses, carrying out vases, pictures, plate, or small pieces of furniture. They smashed everything on81 the cobbles and then returned to wreck more things that would have been destroyed by the fire all the same. It was a revelry of drunken vandalism. They seemed mad, and even risked being burned alive at this work of destruction. Most of the officers were also tipsy; not one of them was saluted by the soldiers.
Strains caused by cutting action, in planing or other machines, fall within and are resisted by the framing; even when the tools are supported by one frame and the material by another, such frames have to be connected by means of foundations which become a constituent part of the framing in such cases.A set of lathe tools should consist of all that are required for every variety of work performed, so that no time will be lost by waiting to prepare tools after they are wanted. An ordinary engine lathe, operating on common work not exceeding  twenty inches of diameter, will require from twenty-five to thirty-five tools, which will serve for every purpose if they are kept in order and in place. A workman may get along with ten tools or even less, but not to his own satisfaction, nor in a speedy way. Each tool should be properly tempered and ground, ready for use 'when put away;' if a tool is broken, it should at once be repaired, no matter when it is likely to be again used. A workman who has pride in his tools will always be supplied with as many as he requires, because it takes no computation to prove that fifty pounds of extra cast steel tools, as an investment, is but a small matter compared to the gain in manipulation by having them at hand.
For compasses, the lead points should be cylindrical, and fit into a metal sheath without paper packing or other contrivance to hold them; and if a draughtsman has instruments not arranged in this manner, he should have them changed at once, both for convenience and economy.Designing is in many respects the same thing as invention, except that it deals more with mechanism than principles, although it may, and often does include both. Like invention, designing should always be attempted for the attainment of some definite object laid down at the beginning, and followed persistently throughout."I am a Netherland jour...."
But he did not take any notice of all my exhortations and was entirely impervious to them in his grief. So I went to the station side by side with the weeping man, and surrounded by the six soldiers. The crackle of the flames, the sound of collapsing houses seemed more terrifying in the night than in day-time, and now and again I got a shock when suddenly, by the uncertain light of the flames, I saw the corpse of a civilian lying in the dark shade of the tall trees on the Boulevard.Presuming the vertical shaft and the horizontal arms of a Barker wheel to be filled with water under a head of sixteen feet, there would be a pressure of about seven pounds upon each superficial inch of surface within the cross arm, exerting an equal force in every direction. By opening an orifice at the sides of these arms equal to one inch of area, the pressure would at that point be relieved by the escape of the water, and the internal  pressure be unbalanced to that extent. In other words, opposite this orifice, and on the other side of the arm, there would be a force of seven pounds, which being unbalanced, acts as a propelling power to drive the wheel.In designing supports for shafts the strains are easily defined and followed, while the vertical and lateral adjustment, lubrication of bearings, symmetry of supports and hangers, and so on, will furnish grounds for endless modification, both as to arrangement and mechanism.
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"It must be done, surely, it must be done! That is her only chance of escape, and if she stops here she will be killed with the rest of us. Oh!... oh!..."It is strange, considering the simplicity of construction and the very important office filled by machines for cutting on plane surfaces, that they were not sooner invented and applied in metal work. Many men yet working at finishing, can remember when all flat surfaces were chipped and filed, and that long after engine lathes had reached a state of efficiency and were generally employed, planing machines were not known. This is no doubt to be accounted for in the fact that reciprocal movement, except that produced by cranks or eccentrics, was unknown or regarded as impracticable for useful purposes until late years, and when finally applied it was thought impracticable to have such movements operate automatically. This may seem quite absurd to even an apprentice of the present time, yet such reciprocating movement, as a mechanical problem, is by no means so simple as it may at first appear."Oh no, sir, not at all!"
The EndA GLORIOUS summer evening, quite refreshing after the exhausting heat of the day. Nature invited to restfulness, and so much the more cruel sounded the incessant thunder of the guns, which also boomed from the citadel. As soon as the Germans had taken possession of this old, dilapidated fortress they proceeded to drag their guns on to it, and trained them on the surrounding forts.
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