1. Anti-corrosive be of 3PE anti-corrosive steel pipe 3PE anti-corrosion ni gbogbo igba ni awọn ipele mẹta: Layer akọkọ ti epoxy powder (FBE> 100um), ipele keji ti alemora (AD) 170 ~ 250um, ati kẹta kẹta. Layer ti polyethylene (PE) 2.5 ~ 3.7mm.Ni isẹ gangan, awọn mẹta mater ...
Ka siwaju