Insimbi Yekhabhoni Ephakeme (Insimbi Yekhabhoni Ephakeme) eyaziwa kakhulu ngokuthi Insimbi Yamathuluzi, okuqukethwe kweCarbon kusuka ku-0.60% kuya ku-1.70%, ukucisha kanye nokufudumeza.Izando nama-crowbars zenziwe nge-0.75% carbon steel;amathuluzi okusika anjengama-drill, ompompi nama-reamers enziwe nge-0.90% kuya ku-1.00% carbon steel.Ubuso be-galvanized ...
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