Familiar with or a basic understanding of steel, plate, pipe material price.
熟悉或基本了解钢材，板材，管材等材料的价格。
This pipe material has high strength and its welding process is complicated.
这种管材强度高、焊接工艺复杂。
The present invention relates to a steel-plastic composite pipe material for transmission of fluid.
本发明涉及一种输送流体的钢塑复合管路材料。
The present invention relates to a steel-plastic composite pipe material for transmission of fluid.
本发明涉及一种输送流体的钢塑复合管路材料。
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