DN16 =DE 20
..20= ...25
...25=...32
...32=...40
...40=.50
50=...63
...63=...75..
.75=..90
...90=...110
PPR管De与DN的换算给排水中材质规格是如何进行换算的,例如；PPR与镀锌钢管?
DN16 =DE 20
..20= ...25
...25=...32
...32=...40
...40=.50
50=...63
...63=...75..
.75=..90
...90=...110