| Project | skills Requirement |
|
Flat test |
When the vertical direction is pressurized until the outer diameter deformation amount is 40% of the original outer diameter, the load is immediately released, and the sample is not broken or delaminated. |
|
Drop hammer impact test
|
At a temperature of 0 ° C and a height of 1 m, the hammer was impacted 10 times with a 1 kg weight, and no cracking occurred for more than 9 times. |
