1.清通堵塞物
2.清除油污堵塞
3.排除故障
1.to remove a blockage from something such as a pipe
1.It should unilaterally boost regional trade by unclogging roads, and by building better ports and freight parks at its borders.
印度应该通过疏通道路，在自己的边境上建设更好的港口与货运园区促进地区贸易。
2.Several Provisions by the Leading Group for Port Affairs on Strengthening the Work of Unclogging Harbours
国务院办公厅转发国务院口岸领导小组关于加强疏港工作的几项规定的通知
3.Unclogging Technology for Pipeline of Coke Oven Gas
焦炉煤气管道的疏通技术
4.Unclogging sinks and toilet bowls
疏通水槽或浴缸阻塞的排水沟