natural asphalt

常见例句

Natural asphalt storage in underground, some forming seam or piled up in the earth's crust surface.
天然沥青储藏在地下，有的形成矿层或在地壳表面堆积。
A new type anti-track RS2000 natural asphalt modifier was introduced. Chemical components of the modifier were analyzed.
介绍了一种新型RS2000抗车辙沥青改性剂，分析了该改性剂的化学组成。
It is not favorable area to find gas field in the area, which the natural asphalt commonly occurs and oil and gas seepage and extensional fracture are developed.
但在广泛古生界地层裸露区，特别是碳酸岩发育的地带，普遍见天然沥青、油气苗及张性断裂，是找油气的不利区域。