dirt legs 是什么意思? On the first blow of any steam header the flanges on all dirt legs should be open. The dirt legs closest to the source of steam may be closed on successive blows so that on the final blow a good steam velocity can be obtained along the entire length of the header. 上面这段话中的 dirt legs 是什么意思?导淋吗?查看更多4个回答 . 5人已关注