Ubufakazi bokuqhuma kwe-Shenhai
Uphalafini, ekamelweni lokushisa, iwuketshezi olubonakala lungenambala noma oluphuzi ngokuphaphathekile olunephunga elincanyana. Iyaguquguquka kakhulu futhi iyavutha, ukwakha amagesi aqhumayo lapho exutshwe nomoya.
Umkhawulo wokuqhuma kaphalafini uphakathi 2% futhi 3%. Umhwamuko wawo ungakha ingxube eqhumayo nomoya, naphezu kokuchayeka endaweni evulekile ilangabi noma ukushisa okukhulu, ingavutha futhi iqhume. Ngaphansi kwamazinga okushisa aphezulu, ukucindezela ngaphakathi kweziqukathi kungakhula, okudala izingozi zokuqhekeka nokuqhuma.