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In the 19th century, employees of the oil industry fought hard against a wax-like substance that accumulated in pump pipes. An English chemist named Robert Chezbro studied “petroleum jelly”. He managed to find out that it has many useful properties.
In the 19th century, employees of the oil industry fought hard against a wax-like substance that accumulated in pump pipes. An English chemist named Robert Chezbro studied “petroleum jelly”. He managed to find out that it has many useful properties.