ASTM : A312,A358,A249, A269, A270, A789, A790...
DIN : DIN 11850, DIN 11866...
EN : EN 10217-7, EN 10357, EN 10312....
JIS : JIS G3459...
GB : GB/T12771, GB/T24593, GB/T19228.2 ...
HG : HG20537
"Realistic, pragmatic and innovative" business philosophy
Material