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Note added at 11 menit (2008-05-08 02:56:41 GMT)
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kalau unsur purchasednya bisa mempertimbangkan:

Pengolahan baja hilir sekunder

Lihat:
http://www.bappenas.go.id/index.php?module=Filemanager&func=...

rolling = proses penggilingan (untuk membuat plat dan batang baja)
drawing = proses penarikan (untuk membuat kawat)
purchased steel = baja yg dibeli/dipesan; lawannya adalah manufactured steel = baja yg diproduksi sendiri

Kutipan berikut ini memperjelas pengertian ketiga istilah tsb:

1. Rolling and Drawing of Purchased Steel in the US
Firms in this industry are mainly engaged in rolling or drawing *purchased steel,* which may *be sourced from either local or offshore suppliers.*
Firms produce a variety of shapes through the *rolling process,* including *plate, sheet, strip, rod and bar,* while the only *drawn product* is *wire* of various grades and gauges. Typically, the end-product is made to conform with customer specifications.The industry does not include firms that roll or draw steel that they have manufactured themselves in either blast furnaces or steel mini-mills.

2. Rolling and drawing of purchased steel
This industry comprises establishments primarily engaged in *drawing wire* or *rolling sheets,* strips and bars from purchased iron or steel.

purchase = diperoleh, dihasilkan

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Note added at 8 hrs (2008-05-08 11:04:17 GMT)
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Diedit:
baja hasil pengerolan atau tarik

"And" - pada umumnya terjemahannya bukan DAN, namun ATAU.
Itu menurut pengalaman saya.

rolling = pengerolan

kamus teknik Ahmad Antoni