Likotoana tsa khoune tsa roller ea rock roller ea fektheri ea API bakeng sa ho cheka seliba se thata

Khamphani ea ho cheka ea Bochabela bo Hare ke mofani oa lisebelisoa tsa ho cheka, ho kenyeletsoatricone bit, PDC tricone bit, sebui se bulang lesoba, bit ea khoune e le 'ngoe ea rollerle tse ding. Re atlehile lefapheng la dipatlisiso tsa dihlahiswa ka ditokelo tsa thepa ya kelello. Re entse tswelopele e kgolo meleng ya ketsiso ya analoge tshimong ya phallo ya lesoba le ka tlase, ntlafatso ya profaele, moralo wa ditlhophiso tsa ho kenya le torque e tlase, theknoloji ya thepa le ya tlhahiso. Ka lebaka leo, dihlahiswa tsa rona di na le dibopeho tse fapaneng tsa tshebeletso le mefuta ya tshebediso. Haholo-holo di sebedisetswa oli le kgase, merafo, geothermal, kaho le tse ding.
Lihlahisoa tsa k'hamphani ea rona li fihletse kholo ea indasteri le ho etsoa ka seriale. Ntle le ho cheka hole-bochabela ho 'nile ha beha bohlokoa phapanyetsanong ea tekheniki le tšebelisano-'moho le basebetsi-'moho le bona lapeng le ka sekepeng.
Lihlahisoa tsa rona li rekisitsoe lefatšeng ka bophara, ho kenyeletsoa United States, Engelane, Canada, Brazil, Italy, Saudi Arabia, Korea, India le Poland jj.