求翻译：直升机头部和尾部都属于非常危险的区域，请勿靠近。登机过程中请遵从地勤人员的指挥，在不关掉引擎的情况下登机请采取弯腰姿势，正常情况下地勤人员会为您打开直升机舱门，如果需要您自己打开飞机舱门时请按以下步骤操作：是什么意思？

Helicopter head and tail is a very dangerous area, do not close. Boarding process, please follow the command of the ground crew, check-in without turning off the engine, take the bent over posture, normally fields a ground crew to open the helicopter door for you, if you need your own when you open

Helicopter head and tail are very dangerous, please do not close to. Check-in process, please follow the command personnel on the ground, without turning off the engine of the check-in please take bending posture, under normal circumstances would be ground staff helicopter door open for you, if you

The helicopter forehead and the rear part all belong to the extremely dangerous region, please do not approach.Boards craft in the process please to comply with ground crew's direction, in does not switch off the engine in the situation to board craft please do adopt bends the waist the posture, in

Helicopter head and tail are very dangerous area, please do not close to. Please follow the attendant's command during the boarding, boarding under the conditions do not turn off the engine, stooped posture, under normal circumstances staff will open the helicopter doors for you, if needed when you

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