A300

?8514.To be eligible for recharging, a DOT 3HT oxygen cylinder must have been hydrostatically tested every three years and be retired from service after

发布于 2021-02-18 22:11:17

【单选题】
A 24 years or 4,380 filling cycles.
B 15 years or 10,000 filling cycles.
C 10 years or 5,000 filling cycles.

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lzq 2023-02-18

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