pugs

I saw the pug marks of the tigress in the soft earth.

我在松软的地里发现那只母老虎的。

The harnessing of noise and smust to boiler are studied,pugging and ventilation are adopted to harnest noise of fan.

过对煤矿锅炉噪声理烟尘理的研究,阐述了过采用隔声械风冷却设施对引风鼓风的降噪理。