Series 550 yog ib qho kev sib txuas kev nyab xeeb uas muaj qhov yooj yim-rau-grip tsim nrog lub siab tsis siv neeg ua haujlwm.Lawv yog cov me me, ntau compact thiab ua kom muaj dej ntws ntau dua li cov qauv sib piv. I t yog ib txhais tes ua haujlwm kev ruaj ntseg coupling uas vents ua ntej disconnection, tshem tawm cov kev pheej hmoo ntawm hose nplawm.Series 550 yog ib tug kev ruaj ntseg coupling uas feature ib tug yooj yim-rau-grip tsim nrog ib tug tag nrho tsis siv neeg ua hauj lwm.Lawv yog cov me me, ntau compact thiab ua kom muaj dej ntws ntau dua li cov qauv sib piv.Nws yog ib txhais tes ua kev ruaj ntseg txuas uas vents ua ntej disconnection, tshem tawm txoj kev pheej hmoo ntawm hose nplawm.