It is obtained by distilling soft pitch in flash column under certain pressure and temperature.
中温沥青经过在一定的压力和温度下进行闪蒸获得。
Steel chisel grassland, pitch surface ground or other soft ground.
使用钢钎在草地，沥青地或其它松软场地上固定篷房。
Steel chisel grassland, pitch surface ground or other soft ground.
使用钢钎在草地，沥青地或其它松软场地上固定篷房。
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