1, Miturut Klasifikasi Metode Produksi (1) Pipa Seamless – Pipa Hot-Rolled, Pipa Cold-Rolled, Tabung Cold-Drawn, Tabung Extruded, Pipe Jacking (2) Pipa Las (A) Sesuai karo Sub-Proses - Arc Welded Pipa, Pipa ERW (Frekuensi Dhuwur, Frekuensi Sedheng), Pipa Gas, Furn...
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