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ENGLISH 波多野结衣种子下载ftp(1.) Why have belts been found better than shafts for transmitting power through long distances?(2.) What are the conditions which limit the speed of belts?(3.) Why cannot belts be employed to communicate positive movement?(4.) Would a common belt transmit motion positively, if there were no slip on the pulleys?(5.) Name some of the circumstances to be considered in comparing belts with gearing or shafts as a means of transmitting power.Without any wish to discourage the ambition of an apprentice to invent, which always inspires him to laudable exertion, it is nevertheless best to caution him against innovations. The estimate formed of our abilities is very apt to be inversely as our experience, and old engineers are not nearly so confident in their deductions and plans as beginners are.

A short time after the destruction I was even obliged to accept it for a whole week, as on the same day on which I arrived in Louvain for another visit there was renewed fighting round the town. The Belgians had advanced as far as Rotselair, where the next day they held their ground against overwhelmingly superior numbers; but at last they had to retire, leaving a great many dead behind. The Belgians had even got on to the road Tirlemont-Louvain, and blown up the railway line in two places.

"Is there any further news about the war in The Netherlands?"The town was on fire, and ruddy smoke hovered over it. Deserted like a wilderness, not a soul moved in the streets. The first street I entered was the Rue de la Station. Large, imposing mansions used to stand here, but the devouring fire consumed even the last traces of former greatness.

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To point out some of the leading points or conditions to be taken into account in pattern-making, and which must be understood in order to manage this department, I will refer to them in consecutive order.Materials consumed in an engineering establishment consist mainly of iron, fuel, sand, and lumber. These articles, or their products, during the processes of manipulation, are continually approaching the erecting shop, from which finished machinery [72] is sent out after its completion. This constitutes the erecting shop, as a kind of focal centre of a works, which should be the base of a general plan of arrangement. This established, and the foundry, smithy, finishing, and pattern shops regarded as feeding departments to the erecting shop, it follows that the connections between the erecting shop and other departments should be as short as possible, and such as to allow free passage for material and ready communication between managers and workmen in the different rooms. These conditions would suggest a central room for erecting, with the various departments for casting, forging, and finishing, radiating from the erecting shop like the spokes of a wheel, or, what is nearly the same, branching off at right angles on either side and at one end of a hollow square, leaving the fourth side of the erecting room to front on a street or road, permitting free exit for machinery when completed.

The upflow of currents of warmed water are a common cause of irregular cooling and springing of steel tools in hardening; the water that is heated, rises vertically, and the least inclination of a piece from a perpendicular position, allows a warm current to flow up one side.In a meadow east of the city I saw three big guns mounted, the biggest I had seen as yet. They kept up a continuous and powerful cannonade at the forts near the town, that had not yet been taken. There were three of them left, of which Loncin was the most important.

In those first days many civilians were killed, and not only in Vis, but still more in the surrounding villages, Mouland and Berneaux, which were soon burnt down and where many a good man was brought low by the murderous bullets. The savage soldiers killed the cattle also, and a large number of carcases had been lying about for days."And then the disaster followed suddenly. At about five o'clock a tremendous explosion shook the fort to the foundations; the powder-magazine had caught fire. It is impossible to describe the appalling results of that explosion; the entire middle-part of the fort collapsed in a stupendous cloud of flames, smoke and dust; it was an awful destruction, an immense avalanche of masses of concrete, fragments of armour, which in their fall crushed to death nearly the whole of the garrison. From this fantastical, confused mass, overwhelming clouds of suffocating smoke escaped through some crevices and holes.

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CHAPTER V

After taking warm leave of the Head of St. Hadelin College, I continued my walk to the Netherland frontier.It may be mentioned in regard to rack gearing for communicating movement to the carriages of planing machines or other purposes of a similar nature: the rack can be drawn to the wheel, and a lifting action avoided, by shortening the pitch of the rack, so that it will vary a little from the driving wheel. The rising or entering teeth in this case do not come in contact with those on the rack until they have attained a position normal to the line of the carriage movement.On that occasion the Germans arrested me at about two miles from Tirlemont. Firstly, because I travelled by bicycle, and secondly, because I was accused of having "cooked" one of my passports.

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