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- The spiral steel pipe is made by rolling low-carbon structural steel or low-alloy structural steel strip into pipe , according to a certain angle of spiral line (called forming angle), and then welding the pipe seams. It can be used for produce large diameter steel pipe with narrow strip steel. T ...Darllen Mwy
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Cyfeiriad cymhwyso a datblygu pibell ddur troellog
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Achosion tyllau aer mewn pibellau dur troellog
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Gofynion ar gyfer pecyn pibell ddur troellog diamedr mawr
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