Bisa ka'idojin masana'antar injina masu nauyi na kasar Sin, duk kayan aikin da aka yi da injin injin injin da ke sama da lOOOt ana iya kiransu da manyan jabu. Bisa ga karfin jujjuyawar injin injin na'ura mai saukar ungulu na kyauta, ya yi daidai da: na'ura mai nauyi fiye da 5t. da jabun diski masu nauyi fiye da 2t.
Manyan jabu sune manyan sassa na asali a cikin kowane nau'in manyan kayan aiki da na'urori masu mahimmanci don gina tattalin arzikin ƙasa, masana'antar tsaron ƙasa da haɓaka kimiyyar zamani.
Ana amfani da manyan jabu a cikin abubuwa masu zuwa:
1. Ƙarfe kayan aikin mirgina kayan aikin yi, tallan talla da manyan sassan tuki, da dai sauransu.
2. Ƙirƙira da latsa kayan aiki module, sandar guduma, guduma shugaban, piston, shafi, da dai sauransu.
3. Manyan sassan watsawa na kayan aikin ma'adinan da sassan manyan na'urar dagawa.

Manyan ƙirƙira:
4. Turbine turbine da janareta rotor, impeller, kariya zobe, babban tube farantin, da dai sauransu.
5. Na'ura mai aiki da karfin ruwa samar da kayan aiki: babban turbine shaft, babban shaft, madubi farantin, latsa forming babban ruwa, da dai sauransu.
6. Nukiliya samar da kayan aiki: reactor matsa lamba harsashi, evaporator harsashi, regulator harsashi, turbi turbi da janareta na'ura mai juyi, da dai sauransu.
7. Babban ganga, kai da farantin tube a cikin man fetur hydrogenation reactor da ammoniya kira hasumiya na man fetur da kuma sinadaran kayan aiki.
8, shipbuilding masana'antu manyan crankshaft, matsakaici shaft, rudder, da dai sauransu.
9. Kayayyakin aikin soja suna kera manyan ganga na bindiga, fayafai na jirgin sama, ganga mai matsa lamba, da dai sauransu.
10. Maɓalli masu mahimmanci a cikin manyan kayan bincike na kimiyya.

Daga: 168 jabun net