Ngwa 321 igwe anaghị agba nchara

A na-etinye eriri igwe anaghị agba nchara 321 na igwe ubi na kemịkalụ, coal, na mmanụ mmanụ nke chọrọ nnukwu nguzogide corrosion ókèala ọka, akụkụ na-eguzogide okpomọkụ maka ihe owuwu ụlọ na akụkụ nwere ọgwụgwọ okpomọkụ siri ike.
1. pipeline combustion gas na-ekpofu mmanụ ala
2. Ọkpụkpọ ikuku nke engine
3. Igwe ọkụ ọkụ, ihe na-ekpo ọkụ ọkụ, akụkụ ọkụ ọkụ
4. Akụkụ dị jụụ maka engines dizel
5. Ụgbọ mmiri nrụgide
6. Ụgbọ njem ụgbọ mmiri
7. Mgbasawanye nkwonkwo
8. Spiral welded ọkpọkọ maka ọkụ na nkụ