Airproof ring series-----alumina airproof rings are manufactured according to the JB/T9013-86 standards, adopting two molding methods. Varieties: flat rings, high-feet rings, strange shape rings.

specifications: φ2-φ65

Major indexes: <1>density≥3.7 ........... <2>rigidity≥86 (Rockwell)
..................... <3>smoothness≤0.02.... <4>content of alumina≥95-99%

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