A vapour cycle upgrade was undertaken to meet the increased avionics cooling requirement, while also introducing an environmentally friendly cooling refrigerant (R-134a).
蒸气周期升级被承担符合增加的航空电子学冷却要求，虽然同样介绍不伤环境的冷却的冷冻剂(R- 134a)。
A vapour cycle upgrade was undertaken to meet the increased avionics cooling requirement, while also introducing an environmentally friendly cooling refrigerant (R-134a).
蒸气周期升级被承担符合增加的航空电子学冷却要求，虽然同样介绍不伤环境的冷却的冷冻剂(R- 134a)。
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