A portable oil or paraffin lamp in which the fuel is forced up into the mantle or burner by air pressure in the reservoir, which can be increased by pumping with a plunger.
- The PT Ultra Prima Cemerlang factory uses thorium nitrate in its production of socks for pressure lamps (petromax).
- The day length was 14 h and additional illumination was provided by sodium high pressure lamps.
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Line breaks: pres|sure lamp
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