But at least one death was real: cosmonaut Valentin Bondarenko died in a pressure chamber fire during ground training less than a month before Gagarin's flight.
In addition, a trim air line from the left mix chamber adds hot air to the flight compartment duct.
另外，从左混合舱出来的配平空气管道增加热空气给驾驶舱管道。
3
Besides, many affecting factors, such as lock chamber dimensions, lock valve conditions and single or multi flight lock situations have been discussed.