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JITAI810 high-precision surface roughness measuring instrument portable smoothne

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COY Horiya roughness meter handheld test surface roughness measuring instrument

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Aluminum alloy surface roughness comparison sample block 0 8-6 3 smoothness samp

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55 degree 60 degree integrated metric inch inch thread gauge thread brace rib te

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TR200 roughness meter metal surface roughness test Japan Mitutoyo SJ210 high-pre

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Thread template tooth gauge rib gauge metric 55 60 degree angle tool template ra

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Jingyu pitch gauge 29°30° trapezoidal thread template JYTL30 ACME T-type tooth n

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