ABOUT METHODS OF WELDING OR CUTTING OR ...
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You might read about how the new Woodrow Wilson Draw Bridge was fabricated in a steel assembly plant before being shipped to Alexandria, VA for installation. It was the biggest drawbridge project of it's kind to date.\n\nhttp://www.wilsonbridge.com/
541906
http://en.wikipedia.org/wiki/Nail_%28engineering%29\n\nread the link
448676
Use the Nickel Metal..Put your steel into a electrolysis solution of Nickle  electrolytes and charge it with electric anode and cathodes.
669421
What extract are you talking about? Different materials require different extraction methods.
47891
Here are some of the more common methods used in sterilization \n  \nHysterectomy:\nVasectomy:\nBilateral tubal occlusion\nIUD Implants\nBilateral Tubal Ligation\n\n\nCheck out the site below, it gives some great information.
91069
Keep checking online. I did print out plans with sources of material last year.  Also, there are finished frames for sale. Maybe Instructables? There are projects for welding bikes,
296196
Virtually all steels are quite weldable.  Those alloys with high percentages of certain metals like chromium must be welded in an inert atmosphere to prevent oxidation of the alloying metals.
594008
The technique is called Post Weld Heat Treatment (PWHT for short). \n\nAdam the Engineer has got it wrong (sorry Adam) and BikerwookieJim has got it almost right.\n\nThe only flaw in his answer is that you CAN rework a piece after PWHT, but you have to repeat the PWHT after the rework. The cost of doing PWHT is high and can be very high for large pieces (like in ship building), so you try to do it only once.\n\nPieces that have undergone PWHT are usually marked as such so that nobody does any rework which (as BikerwookieJim said) would leave a week point prone to failure.
466916
use an acetylene torch aluminum rod & flux.
619708
you could porb try an internet site like howstufworks.com
474350
Determining 3D protein structures in my line of work\n\nAlso used to determine the best ways to make alloys and composite materials
535640
a picture is worth 1000 words --> http://images.google.com/imgres?imgurl=http://www.metalwebnews.com/howto/bandsaw/sawl.gif&imgrefurl=http://www.metalwebnews.com/howto/bandsaw/saw1.html&h=1982&w=1286&sz=58&hl=en&start=11&tbnid=aPmSNNATpMeNGM:&tbnh=150&tbnw=97&prev=/images%3Fq%3DBand%2BSaw%26svnum%3D10%26hl%3Den%26lr%3D%26sa%3DG
565036
Friction stir welding.\n\nhttp://www.azom.com/details.asp?ArticleID=1170
252904
You should have a cutting tip (this has one larger hole surrounded by smaller holes). Cutting tips also come in different sizes like the normal tips, so first you have to figure out if you have a cutting tip and which size it is. The size should be written on your tip. And the size of your tip will determine which metal thickness you can cut. I put a link to some website which lists the psi, though I don't know how general this is (I wouldn't go up to 15 with the acetylene, stay safely below that, but then I wouldn't try to cut a 6 inch thick steel plate with a gas torch anyway). You can look around if you find other tables, preferable ones which are for your cutting tip.
327839
You basically need information on metal manufacturing, casting, and molding.  Not really something that can be done at home.
38729
Use a razor blade...be careful....don't cut yourself.
316672
usually a bone saw, sometimes an electric one! why do you want to know? depends on what limb too, sometimes they just use scissors..very big and very sharp ones.