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Rockwell, Hardness Tester
<DTR-100>		 Rockwell, Hardness Tester
<DTR-200>		 Rockwell, Hardness Tester
<DTR-300>		 BRINELL, Hardness Tester
<DTB-500>
BRINELL, Hardness Tester
<DTB-600>		 BRINELL, Hardness Tester
<DTB-700>		 AUTO Brinell, Hardness Tester
<DTB-800>