Bitumen glue (call bitumen Ma the base of a fruit fat again) it is bitumen is mixed right amount and farinaceous or fiber shape is mineral inserts, contain the mixture of thinner sometimes.

• 沥青胶（又称沥青玛蒂脂）是沥青和适量粉状或纤维状矿物填充料，有时含稀释剂的混合物。