题目内容
Drum brake_____ Manual transmission___ Shock absorber____ Pitman arm____ Steering column___
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Space utilization________ Loading state_______ Wind resistance_______ Rigid connection_______ Quarter window________
High-voltage spark________ Cruise system_______ Instrument cluster_______ Ignition switch_______ Winding coil________
IC_____ diesel engine ____ petrol engine _____ Exhaust ____ combustion chamber _____
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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