Cold clearances between the skirt of an aluminum piston and the cylinder liner is about （）<br>A:twice as large as with a cast iron piston<br>B:the same size as with a cast iron piston<br>C:half as large as with a cast iron piston<br>D:the same size as the crown of an aluminum piston

Cold clearances between the skirt of an aluminum piston and the cylinder liner is about （）
A:twice as large as with a cast iron piston
B:the same size as with a cast iron piston
C:half as large as with a cast iron piston
D:the same size as the crown of an aluminum piston

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