Imishini yokumba imbobo ejulile ye-Sanjia isetshenziswa kakhulu ekucubunguleni amaroli okugaya amaphepha.
Senza ngendlela oyifisayo osayizi abahlukahlukene kanye nokucushwa ngokuhlobene nezinhlobonhlobo zamarola adingekayo kunqubo yokukhiqiza.
Ama-deep hole borer asetshenziselwa ukusebenza kwe-counterboring yama-diameter amakhulu kanye nemishini eminingi yokumba izibhamu isetshenziselwe ukomisa imiqulu.
Isikhathi sokuthumela: Jan-19-2024