Where can I make a fire-retardant cable test report in Changchun-the test cost is high.

Of course. Sinosteel can do flame-retardant and fire-resistant wire and cable inspection, and the inspection items include: sheath thickness and ellipticity. The total cost of testing is 200 yuan each. Shielding cables is to shield the interference of external electromagnetic waves (radio frequency lines) or prevent the interference of high-frequency signals in cables to the outside world (signal lines) and the mutual interference between lines (computer lines).