(!) Since support from Microsoft will end on January 14th, 2020, Windows 7 will be excluded from the recommended environment from December 15th, 2019 on this site. Vì lý do Microsoft kết thúc hỗ trợ cho Windows 7 vào ngày 14/01/2020, Windows 7 sẽ là hệ điều hành không được khuyến khích sử dụng với trang web này từ ngày 15/12/2019.
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ISO / JIS compliant reference test piece for indirect verification of hardness testers.
Hardness standards are based on globally recognized figures.
Hardness Classification | HRES |
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Please check the type/dimensions/specifications of the part HRES-90 in the HRES Hardness-Standard Piece series.Vui lòng kiểm tra kiểu/kích thước/thông số kỹ thuật của phần HRES-90 trong chuỗi HRES Hardness-Standard Piece.
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