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Resistance-ozone: Putting it in the ozone with 40℃ and 200pphm, after 70 hours no cracks.
Resistance-crook: At the frequency 300cpm and compression +2m, after it is compressed 500 thousand times, no changes.
Resistance-cold: At-40℃ x 5h, after fold up 108℃, no cracks.
Resistance-water: Putting it in the water of 40℃, after 240 hours, no distention and the reduction of mechanical performance.
The power of break≥250N
Cementation in tensity≥30N/cm
