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    Software name: appdown
    Software type: Microsoft Framwork

    size: 640MB

    Lanuage:Englist

    Software instructions

      In planing and turning, the tools require no exact form; they can be roughly made, except the edge, and even this, in most cases, is shaped by the eye. Such tools are maintained at a trifling expense, and the destruction of an edge is a matter of no consequence. The form, temper, and strength can be continually adapted to the varying conditions of the work and the hardness of material. The line of division between planing and milling is fixed by two circumstancesthe hardness and uniformity of the material to be cut, and the importance of duplication. Brass, clean iron, soft steel, or any homogeneous metal not hard enough to cause risk to the tools, can be milled at less expense than planed, provided there is enough work of a uniform character to justify the expense of milling tools. Cutting the teeth of wheels is an example where milling is profitable, but not to the extent generally supposed. In the manufacture of small arms, sewing machines, clocks, and especially watches, where there is a constant and exact duplication of parts, milling is indispensable. Such manufactures are in some cases founded on milling operations, as will be pointed out in another chapter.


      Dont you, Dick?


      The seaplane is almost down on the waterand coming like an arrow toward that white preserver! gasped Dick. Will its wings hit the yacht?I went to the commander's office, and on the way copied the following Proclamation:

      His mind leaped through a multitude of theories and of suspicions.Pretending to be unaware of the arrival, the Sky Patrol issued from the house.

      That I was "wanted" is proved by the fact that two persons have had the greatest trouble because they were mistaken for the Mokveld-Correspondent of De Tijd. My colleague Kemper passed a fortnight in prison in Brussels, accused of having written various articles in De Tijd, which were written by me, and I relate, in the chapter "Round about Bilsen," what Mr. Van Wersch, another Netherlander, suffered for the same reason.But we dont need to guess, Sandy said. Before I began asking questions I met Jeff on the way here. He explained what made him suspect the man who said he must repair his stalled engine with a bolt that he knew was not madea slotted bolt. I slipped down across that estate to the inlet and saw the amphibian. And Mr. Whiteside was in it, supervising the filling of its tank!


      I wonder if he saw two people coming and crawled into the fuselage, Larry said.Jeff! Dick knelt and lifted the mans head.

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      CHAPTER XXIII. FORGING.Its a kind of sense thats common enoughbut

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      Jeff, peering, located the wing of the seaplane, the fuselage half submerged in muddy channel ooze, the tail caught on the matted eel-grass.

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      If asked for advice as to the most important object for an apprentice to aim at in beginning his fitting course, nine out of ten experienced men will say, "to do work well." As power is measured by force and velocity, work is measured by the two conditions of skill and time. The first consideration being, how well a thing may be done, and secondly, in how short a time may it be performed; the skill spent on a piece of work is the measure of its worth; if work is badly executed, it makes no difference how short the time of performance has been; this can add nothing to the value of what is done although the expense is diminished.


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