High pressure heater u-shaped tube Common standards, national standards:GB/T14975-2002 GB/T14976-2002 GB13296-91 GB13296-2007And so on, the foreign standar
High pressure heater u-shaped pipe Common standards, national standards:GB/T14975-2002 GB/T14976-2002 GB13296-91 GB13296-2007And so on, the foreign standar