bw casing njikọ nkwụnye

Nkọwa dị mkpirikpi:

Ebe Mmalite: China
Aha ika: JCDRILL
Nọmba nlereanya: ABNHPS
Ụdị: nkwụnye njikọ
Ihe: Steel
Jiri: Ngwuputa ihe, ihe owuwu, geotechnical, nyocha
Aha: nkwụnye njikọ