Pengeboran rock dianggo miturut prinsip impact crushing.Nalika digunakake, piston nggawe gerakan bolak-balik frekuensi dhuwur, terus-terusan nyebabake shank.Ing tumindak saka pasukan impact, bit pengeboran wedge-shaped cetha crushes watu lan chisels menyang ambane tartamtu, mbentuk ...
Waca liyane