A self-service air compressor,welcomed. Causions:-Amount of " gas -explosion" released high; Recommend to test pressure control before inflation.
(1)You have only paid all your bills for last month. (2)There are some bills to be paid by you this month,ie.water charges, gas charges, and network fees.
HERE balloons have saved drivers' gas cost through a new and interesting way. HERE 氣球透過新鮮又有趣...
你不了解其中的原理，因果關係搞錯了，氣體受熱之後體積會膨脹沒錯，但是膨脹的過程中會對外在環境作功，所以它本身的能量會減少，溫度會下降(理想氣體方程式(ideal – gas equation) : PV = nRT)。