Mtundu wa mbale zam'mwamba ndi zam'munsi za zokutira zotsekemera si zolondola, ndipo mtundu wa mbali ziwiri za mbale ndi zosiyana.Komanso, mtundu wakuda ndi chiyani?Katswiri wochokera ku Rich Special Materials Co., Ltd, a Mu Jiangang, akufotokoza zifukwa.Kudetsa kumachitika chifukwa cha mpweya wotsalira ...
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