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In spot welding, the parts to be joined are normally over lapped. The work piece are clamped between two water cooled copper electrodes. On the passage of a high transient current, the interface melts over a spot and form the weld. The cooling at the electrode limits the size of the spot. A very high current is needed for a very short duration to complete the welding. The interfaces to be joined are initially cleaned by various methods, including scratch brushing and vapour decreasing. A spot weld normally contains some porosity at the weld centre, which unless excessive is harmless.
The spot welding process is difficult to use for highly conductive materials such as aluminum and magnesium.
At a machine tool plant, five jobs must be completed each day. The time it takes to do each job depends on the machine used to do the job. If a machine is used at all, there is a s
Using this link and the information therein ( http://www.sec.gov/Archives/edgar/data/1110452/000119312507151600/d20f.htm#tx19738_13.) find Air France’s weighted average cost of ca
What is Absolute Return Fund The absolute return strategies develop returns from active management with small or no underlying market exposure, seeking to achieve positive returns
Why would an investor buy preferred stock? A buyer that wants the benefit potential of value but wants to reduce possibility would buy recommended inventory. The buyer would rec
what is rigidity modulus?mention its units?
What is Variable Interest Rate? Interest rates which is offered by banks or financial institutions on loans or deposits which are liable to change according to circumstances. For e
Ne w building completion: New buildings have to be constructed to meet certain fire safety standards. It is not acceptable for buildings to be built that do not attain a min
i have homework in my biomechanics class
Causes of unbalance Unbalance may be caused by a variety of factors occurring singly or in combination with others. These factors include:- a) Eccentricity Eccentricity
Specific heat capacity of water in a continues flow method?
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