岩沥青 meaning in Chinese

kir
rock asphalt
rock tar

The proportion design of modified asphalt concrete
北美岩沥青改性沥青混凝土配合比设计
The proportion design of butonite mastic asphalt modified asphalt concrete
布敦岩沥青改性沥青混凝土配合比设计
Determination of bitumen - content in natural rock - asphalt powders and masitc asphalts with " kumagawa - asphalt " method
用熊本沥青法测定天然岩沥青粉和砂胶沥青的沥青含量