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HRS-150 Superficial Rockwell Hardness Tester
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HRS-150B Digital Display Rockwell metal hardness tester
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HRD-150 Electric Rockwell hardness meter
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HRD-150B Motor Driven High Stroke Rockwell Hardness Tester
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XHR-150 Manual Plastics Rockwell Hardness Tester
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XHRD-150 Electric Control Plastic Rockwell Hardness Teste
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XHRS-150 Digital Plastics Rockwell Hardness Testing Instrument
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HRD-45 electric surface Rockwell hardness tester