Ball valve structure features 1. The fluid resistance is small, and the ball valve is the one with the smallest fluid resistance in all valves. Even if it is a reduced diameter ball valve, the fluid...
15 points can be concluded that the seamless steel pipe is not a fake seamless steel pipe 1. Indiscriminate steel pipe prone to fold. Folding is a variety of fold lines formed on the surface of the...
1. The flange plate is rolled with negative deviation, but delivered according to the actual weight, the utilization rate is increased by 1 to 5 percentage points compared with the steel plate. 2....
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