Cast iron pipe and seamless steel pipe and galvanized steel pipe different materials, cast iron is iron, seamless steel pipe is steel; different production processes, cast iron is cast iron, seamless...
Precision seamless steel pipe is a kind of high-precision steel pipe after cold drawing or hot rolling. Because the precision seamless steel pipe inner and outer wall without oxide layer precision...
Large-caliber thick-walled seamless steel pipes are divided into seamless steel pipe hot-rolling and hot-spreading. Hot-rolled seamless steel pipes are divided into general steel pipes, low- and...
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