氧气力量

Crawley, West Sussex.
　　Several demonstrations / experiments involving oxygen are seen at the laboratories of Britain's biggest oxygen producer (unnamed).
　　A man wearing goggles uses an oxyacetylene cutter to slice through a slab of metal; sparks fly out. Various shots show a demonstration of a portable oxygen resuscitator; a woman lies on the ground beside a plug socket and plug with a broken wire. A man puts the oxygen mask from the resuscitator over the woman's mouth and nose and she comes round.
　　Other demonstrations show bubbling beakers of oxygen and nitrogen; the nitrogen puts out a flame from a match. Mercury is frozen into a solid block in liquid oxygen; the petals of a rose bud are petrified by the liquid, shattering when touched by a scientist's glove. A model steam engine is driven (on the spot) by liquid oxygen; a miniature cannon is fired after being filled with liquid oxygen. An egg and a banana are 'cooked' in a vat of boiling oxygen; they are taken out and hit with a hammer, causing them to shatter.
　　Various shots outside show a man standing at a tanker truck, taking off a pipe that is pumping oxygen gas into it. Another man checks some oxygen cylinders then several shots show him using an oxyacetylene burner to cut through a corrugated metal sheet and through a block of concrete behind it; lots of sparks fly out the other side of the block.
　　（https://www.britishpathe.com/video/the-power-of-oxygen）