河北铸石管厂

In the past, most elbows in every factory were made of cast stone elbows, which were characterized by fragility and cracking, and worn backpacks with a wall thickness of 25-35 mm, and some of them were zhongyaoji.37ix.com.cntongdiaopin.71ix.comhugan.37ix.com.cngxianwei.37ix.com.cndiaosuoju.37ix.com.c

nhandan.37ix.com.cnnearly 40 mm. After a short time of wearing and cracking on the inside, pulverized coal wore out along with the cracks on the outside, and its service life had only one overhaul period. And there are often air holes in the interior, which are easy to leave hidden dangers. Once worn out, the site can not be repaired.