The prototype of the machine used in EBM process was first introduced in which year?(a) 1924(b) 1943(c) 1947(d) 1956I have been asked this question in unit test.I want to ask this question from Electronbeam Machining-Introduction, Equipment and Material removal topic in chapter Thermal Processes of Advanced Machining

The prototype of the machine used in EBM process was first introduced

1.	The prototype of the machine used in EBM process was first introduced in which year?(a) 1924(b) 1943(c) 1947(d) 1956I have been asked this question in unit test.I want to ask this question from Electronbeam Machining-Introduction, Equipment and Material removal topic in chapter Thermal Processes of Advanced Machining
Answer» The correct option is (C) 1947 Explanation: Steigerwald was the scientist who DESIGNED a prototype machine of ELECTRON BEAM machining in 1947.

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