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PUNCH FOR HOLE EXPANSION TEST AND HOLE EXPANDING TEST DEVICE INCLUDING SAME
PUNCH FOR HOLE EXPANSION TEST AND HOLE EXPANDING TEST DEVICE INCLUDING SAME
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机译:扩孔试验冲孔装置和扩孔试验装置,包括相同的
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摘要
Disclosed are a punch for a hole expansion test and a hole expanding test device including the same. According to an embodiment of the present invention, the punch for a hole expansion test comprises: a reaming unit entering a hole of a material, and having an external surface that is formed to be conical; a support unit connected to the reaming unit, and mounted in a device; a light emitting groove provided in the center of a front end of the reaming unit; and a lighting unit installed in the reaming unit to irradiate light to the light emitting groove.;COPYRIGHT KIPO 2019
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