题目内容
P___________ may have various top designs such as flat, concave, and convex or any one of a great variety of shapes to match the c___________ design in the cylinder head. P______________ are cut into the sides of thepiston just below the piston head. The lower grooves often have holes or slots in the bottom of the groove to permits o_______________ from behind the rings.
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Camshaft_____ Valve clearance_____ valve spring______ DOHC_____ timing chain______ valve overlap_______ lifter______ exhaust/intake valve_______
lubricating oil_____ oil pump_____ oil filter______ oil strainer_____ oil sump______
intake manifold_____ fuel line_____ fuel filter ______ fuel injector_____ fuel tank______
spark plug_____ ignition coil_____ ignition switch ______ battery_____ distributor______
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