N'elu ogwe aka nke ọla kọpa bụ ọrụ nke, bụ nke ndị na-agba ọsọ na-agba ọsọ, na-arụ ọrụ n'okpuru ịmịnye esemokwu, njikọta na-agba gburugburu, enyemaka dị mkpa maka ịnweta usoro sistemụ arụmọrụ. N'okpuru ọnọdụ nke mmiri mmiri mmanu, eji elu bụ n'ígwè mmanụ enweghị kpọmkwem kọntaktị, nwekwara ike ukwuu belata esemokwu ọnwụ na eyi nke elu mmanụ ịse nwekwara a ụfọdụ vibration-adọrọ ike

Bụ mmanu, jụrụ, mgbochi esemokwu, ogologo ndụ, wdg

Ọla kọpa aka uwe na-bụ-eji na ígwè ọrụ, na-ebi akwụkwọ na dyeing, papermaking, chemical, aerospace, unyi, mmanụ, ụgbọala, injinịa ígwè, Metallurgical na ndị ọzọ ọrụ.