Inkcazo esemgangathweni ye-ASTM ye-A335 yoMbhobho weSteel ongenamthungo weFerritic alloy-Steel kwiNkonzo yoBubushushu obuphezulu
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Inkcazo esemgangathweni ye-ASTM ye-A335 yoMbhobho weSteel ongenamthungo weFerritic alloy-Steel kwiNkonzo yoBubushushu obuphezulu