Maintenance standards for civil aircraft. Unit 2: ground safety. Part 46: ground cabin pressurization test for civil aircraft.
民用航空器维修标准。第2单元：地面安全。第46部分：民用航空器座舱地面增压试验。
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Hatch mounted portables: Your alternatives start with a portable unit like the Carry on, a good choice for cooling the small cabin of a cuddy cabin powerboat or overnighter sailboat.