Ikhampasi yabangasebenzi. Uma noma nini udinga ukwazi ukuthi inyakatho, eningizimu, entshonalanga noma empumalanga, isicelo singaba usizo. Khumbula ukuthi kunezinombolo eziningi zama-electromagnetic ezingenza ukuchithwa kwanoma yikuphi ikhampasi kuhluleka.
Kubuyekezwe ngo-
Jan 7, 2019