what is the "舱外排气口"?
2024-01-18维修英语2
What is the "作动筒"?
2024-01-18维修英语2
What is the "膜盒电门"?
2024-01-18维修英语2
What is the "氧气发生器"?
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What is the "释压调节器"?
2024-01-18维修英语2