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The Chevrolet Rear Bumper is a safety device that absorbs and mitigates external impact and protects the front and rear of the body. Many years ago, the front and rear bumpers of the car were stamped into steel with steel plates, riveted or welded together with the frame rails.
Performance testing of Auto Parts: First, the engine cylinder seal test. There are seven factors affecting the cylinder sealing performance, mainly including cylinder wear, piston ring damage, piston wear, valve seat damage, valve guide wear, cylinder head gasket damage, valve clearance and other aspects.
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