robert wilhelm bunsen (1811-1899), german chemist, wood engraving, published 1883 - 本生燈 幅插畫檔、美工圖案、卡通及圖標
history science, experiment,lever pyrometer (historically also referred to as a dilatometer) is a mechanical laboratory apparatus used to demonstrate and measure the thermal linear expansion of metals, victorian 19th century vintage illustration - 本生燈 幅插畫檔、美工圖案、卡通及圖標
complex industrial steam atomizing burner ,this technology was used to burn the heaviest, cheapest, and most stubborn fuel oils (like residual fuel oil or mazut) that were too thick to burn in a standard wick lamp - 本生燈 幅插畫檔、美工圖案、卡通及圖標
antique illustration, physics principles and experiments, electricity and magnetism: electric battery bunsen cell - 本生燈 幅插畫檔、美工圖案、卡通及圖標
