It is obtained by distilling soft pitch in flashcolumn 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。
2
The drying of calcium carbonate made with nano-technology is currently by the methods such as baking at baking shop, drying at rotating column, spraying baking, flash drying and band-type baking.
纳米碳酸钙新产品的干燥，目前大多采用烘房烘干、转筒干燥、喷雾烘干、闪蒸干燥、带式烘干等方法。
3
The officers were scrutinizing every one in the column, sometimes speaking to each other, going forward to flash a light in someone's face.