Q: Compose a new way to ask the same question. The new question must be asking the exact same thing as the original question does. Without any other information, you should be able to tell that the original question and the new question are the same. Preserve bracketed phrases in your new question. You can change the rest of the question provided the above requirements are satisfied. The new question must have a natural, fluent formulation, as if it were composed by a native English speaker. You will be given three pieces of information to help you create better questions. Those are: "Answer": the answer to the question, e.g., "Honolulu". "Answer Type": the type of the answer, e.g., "Location". "Auxiliary Information" is a detailed description of some concepts mentioned in the question, if any.
original question: Find pistons that use [V12 engine]
answer: rolls-royce merlin, f133 engine
answer type: Piston engine.
auxiliary information: A V12 engine is a V engine with 12 cylinders mounted on the crankcase in two banks of six cylinders, usually but not always at a 60 angle to each other, with all 12 pistons driving a common crankshaft. Since each cylinder bank is essentially a straight-6 which is by itself in both primary and secondary balance, a V12 is automatically in primary and secondary balance no matter which V angle is used, and therefore it needs no balance shafts. A four-stroke 12 cylinder engine has an even firing order if cylinders fire every 60 of crankshaft rotation, so a V12 with cylinder banks at a multiples of 60 will have even firing intervals without using split crankpins. By using split crankpins or just ignoring minor vibrations, any V angle is possible. The 180 configuration is usually referred to as a Flat-twelve engine or even a boxer although it is in reality a 180 V since the pistons can and normally do use shared crankpins.
A:
which are the pistons that use [V12 engine]