block and heads I would imagine
Piston & Cylinder are two main parts of an engine.
Piston & Cylinder are two main parts of an engine.
yes,they have two main body parts
The two main parts of setting are time and place.
The two main parts of the circulatory system is the Heart and The Blood.
Two of the main parts of mass are the Introductory Rites and the Liturgy of the Word. The other two main parts are the Liturgy of the Eucharist and the Concluding Rites.
The two parts are the Old Testament and the New Testament.
bridge and main deck
The two main part of a budget are income and expenses.
The two main parts of the pns are the ,the sensory part and the motor part.
The two main part of circulatory system are hearth and Arteries
Presuming that you mean "cylinder", the two parts are the bore and sleeve.