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1971 Physics Bull. July 406/3 Deep penetration welding using electron beams is becoming quite widely used for assembling pre-machined parts into complex assemblies as an economic alternative to forging, casting and mechanical fastening.

1997 Proc. Royal Soc. A. 453 1092 The assembly of the thermocouple is shown in plan view in figure 10 and was housed in a premachined slot in the workpiece.