Dab tsi bolts yuav tsum tau kuaj xyuas? bolt soj ntsuam txoj kev Kev soj ntsuam zoo tuaj yeem ua tiav los ntawm ntau yam xws li cov khoom tiav bolt tensile load, qaug zog test, hardness test, torque test, tiav bolt tensile zog, bolt txheej, qhov tob ntawm decarburized txheej, thiab lwm yam. Rau fastener produ...
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