Ichi ndi mankhwala ophera tizilombo toyambitsa matenda opangidwa ndi fakitale yaku China.Zogulitsazo zidapangidwa kuti ziphatikizepo mankhwala ophera tizilombo komanso kusungunula mpweya wabwino wogwiritsidwa ntchito m'zipatala, zipatala, ndi zipatala zina.Zimapangidwa pogwiritsa ntchito zida zapamwamba komanso matekinoloje apamwamba kuti zitsimikizire kuti zikuyenda bwino komanso zodalirika.Chogulitsacho ndi chosavuta kugwiritsa ntchito ndipo chitha kugwiritsidwa ntchito kwa ma ventilator amitundu ndi mitundu yosiyanasiyana.