词汇 | porcupine head |
释义 | porcupine head noun in hot rodding and motor racing, the cylinder head on the big-block engines manufactured by Chevrolet. John Edwards, Auto Dictionary, 1993, gives a neat etymology: 'When the valve covers are removed, the valve stems appear to stick out at odd angles, like the needles on a porcupine' US, 1993 |
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