The inner and outer walls of the pressure steel pipe are sprayed and rusted by a steel abrasive and a steel wire mixed abrasive. The inner wall surface of the steel pipe is sprayed with epoxy paint.
The price of raw materials fluctuates at a low level, and the cost is difficult to support; however, most of the price of steel pipes is already at the bottom, the pressure on capital will be eased, and the merchants will continue to be cautious and wait for shipments.
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