David L. Ellis Master Calibration Kit (Grade A Series)
David L. Ellis Master Calibration Kit (Grade A Series)
David L. Ellis Rockwell Test Block
David L. Ellis Rockwell Test Block
David L. Ellis Micro Vickers Hardness Test Block
David L. Ellis Micro Vickers Hardness Test Block
David L. Ellis Brinell Test Block
David L. Ellis Brinell Test Block
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