I-valve ye-Rotary isetyenziswa ngokubanzi kwizixhobo ezifana ne-dusters, izikali ze-elektroniki kunye noomatshini abakhulayo abbakwinkqubo yokuvelisa -forage efana nokulungiselela, unyango, ukutyumza, ukuxuba, ukufudumala, ukwandisa, ukupakisha kunye nokugcinwa kwezinto eziluhlaza。Sibonelela ngokujikeleza……
基础ngokugqithisileyo