Leh is a town in the Ladakh union territory in northern India.
常见问题解答
问:
In petroleum refining, what name is given to the process by which heavy hydrocarbon molecules are broken up into lighter molecules by means of heat and pressure?
答:
In petroleum refining, cracking is the process by which heavy hydrocarbon molecules are broken up into lighter molecules by means of heat and usually pressure and sometimes catalysts.
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