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Kodi A Down The Hole Drill Ndi Chiyani?
Kodi kubowola pansi ndi chiyani?Makhalidwe ogwiritsiridwa ntchito Kubowola kwauinjiniya kutha kugwiritsidwa ntchito pobowola zibowo za chingwe cha nangula, mabowo a nangula, mabowo ophulitsa, mabowo obowola ndi ntchito zina zoboola m'nyumba zamatawuni, njanji, misewu yayikulu, mitsinje, mphamvu yamadzi ndi ntchito zina.khalidwe...Werengani zambiri -
Mfundo Yogwira Ntchito Ya Air DTH Hammer
Mfundo yogwira ntchito ya mpweya wa DTH nyundo Monga momwe tawonetsera pa Chithunzi 2-5, pali pisitoni mu silinda.Mpweya wopanikizidwa ukalowa m'chipinda chapamwamba cha silinda kuchokera ku mpweya wolowera, mphamvu ya mpweya woponderezedwa imagwira kumapeto kwa pisitoni ndikukankhira pisitoni kuti ipite pansi.Pamene ine...Werengani zambiri -
Kodi RC Drilling ndi Chiyani?
Kodi RC Drilling ndi Chiyani?Kubowola reverse circulation ndi imodzi mwama positi njira zodziwika bwino pakubowola mchere.Wobadwira ku Australia, tikuwona ndikukudziwitsani za RC kubowola.Izi ndi zomwe tikhala tikukambirana: Zoyambira Zobowola M'malo Ozungulira Mtengo wa R...Werengani zambiri -
Kodi Magawo a DTH Bits Ndi Chiyani?
1. Mtundu wa Convex: Kanthu kameneka kamabwera m'njira ziwiri, bwana mmodzi ndi bwana wapawiri.Chomalizacho chimagwiritsidwa ntchito makamaka pazigawo zazikulu za DDP.Ma Convex DDR amatha kusunga ukubowola kwakukulu pobowola miyala yolimba komanso yolimba, koma kubowola kumakhala koyipa, kotero sikoyenera pakubowola mainjiniya...Werengani zambiri
