Hangao Tech muaj qhov ua tau zoo ntawm Cov Menyuam Hloov Cov Txheej Txheem rau Tube Mills, ua kom muaj kev hloov pauv sai thiab tsis sib haum los txhim kho kev ua haujlwm ntau lawm.Tshawb xyuas peb qhov system tsim los rau kev hloov pauv sai thiab tsis muaj teeb meem.