联系人 Mr. NIMA
North Vancouver, vancouver, British Columbia
Asphalt, also known as bitumen, is a sticky, black, and
highly viscous liquid or semi-solid form of petroleum. It may be
found in natural deposits or may be a refined product, and is
classed as a pitch. Before the *0th century, the term asphaltum was
also used.
Bitumen" is still the preferred geological term for
naturally occurring deposits of the solid or semi-solid form of
petroleum. "Bituminous rock" is a form of sandstone impregnated
with bitumen. The oil sands of Alberta, Canada are a
similar material.
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