Three ways of the internal blowing-off, i. e. , cold blow, hotblow, and gas exhausting in a Clock Hood-type furnace.
本文着重研究钟罩炉内吹扫（ 排气、冷吹和热吹）三种方式。
2
Since the hotblow has no effect and the negative ions increase the moisture content, the effect of negative ions is great.
因不受热风的影响，负离子的含水量大大提高，负离子效果更加显著。
3
The utility model relates to a hot shrinkage pipe device which can evenly hotblow a plastic pipe to be deformed and quickly cold blow the deformed plastic pipe for shaping.