deck pipe for concrete pump spare parts 
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2.Double-layered concrete pump straight pipe The double-layered concrete pump straight pipe is produced by special process using two seamless pipes. The material of the inner pipe is special alloy 45Mn2 and the outer pipe is 1020 low carbon steel. The specification of double-layered concrete pump straight pipe is the similar with the above single layered concrete pump pipe. However, its service life is improved greatly from 50000 cubic meters to 80000 cubic meters. Jean Gao for this line many years Any comments will be very appreciated Phone : +86 13730593715 MSN : jeangao1211@hotmail.com SKype : jeangao1211 Mail : jeangao1211@hotmail.com
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