第一次气球氢气 (1783 年 8 月 27 日) 由雅克 · 亚力山大 César 查尔斯 (法国气球驾驶员,1746年-1823年) 的灌装。从我的档案,原始木刻出版于 1877 年。 天然气 热气球 户外 氢气球
Illustration of a simple coloured sketch of the balloons on a white background 矩形 风 庆祝活动 Simple coloured sketch of the balloons
Different colorful air balloons seamless pattern 风 冒险 度假 Different colorful air balloons seamless background
The production of hydrogen (sulfuric acid with the addition of iron) for filling a balloon. Historical document of the times from the 19th Century. Woodcut engraving, published in 1877. 每桶 刻的图像 氢 Hydrogen
Illustration of a simple drawing of the coloured balloons on a white background 矩形 风 紫色 Simple drawing of the coloured balloons