in practical applications, the air shaft is convenient to operate, quickly, no damage for ... , and using imported ballonet.2.The shaft is casted by aluminum alloy, shaft body plated by chromium, and assembled ... filling gas for the nozzle jet, to make the shaft of off-axle apperance uniform expansion, thereby lock nitrogen ... "Ø150mmØ155 – Ø158mm8 "Ø200mmØ205 – Ø208mm machine parts key type air shaft