She works in a toy shop, I was with my five year old daughter, and was pointing to the sign, "Rent a Helium Tank!" FML.
可是事情是这样的，她在玩具店工作，我带着我5岁的女儿去买气球，然后我指着“出租氢气瓶”的牌子问出这句话。
The system can pump the helium in the gasbag back to the high-pressure gas storage tank through the compressor or control the exhaust valve to exhaust so as to adjust buoyancy force.
本系统可通过压缩机将气囊中的氦气抽回高压贮气罐或控制排气阀放气来调整浮升力。
The system can pump the helium in the gasbag back to the high-pressure gas storage tank through the compressor or control the exhaust valve to exhaust so as to adjust buoyancy force.
本系统可通过压缩机将气囊中的氦气抽回高压贮气罐或控制排气阀放气来调整浮升力。
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