Paip keluli B Gr A53 ASTM
ASTM A53 paip keluli OD 219.1mm SCH 40 Gred A, Gred B
September 27, 2016
Gred ASTM A252 2 pilling paip
ASTM A252 cerucuk paip gred 3 OD 219mm
September 30, 2016