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足迹。

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

通过对煤矿锅炉噪声理和烟尘理的研究,阐述了通过采用隔声罩和机械通风冷却设施对引风机和鼓风机的降噪理。