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。
Natural asphalt storage in underground, some forming seam or piled up in the earth's crust surface.
天然沥青Natural asphalt：天然沥青储藏在地下，有的形成矿层或在地壳表面堆积。
Sprinkler water tank and the nozzle, spraying machines and asphalt storage tanks and nozzles similar material.
洒水车的水箱和喷嘴等与沥青洒布机的贮料箱及喷嘴类同。
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