@vjay_pan 这个书应该很有意思! 前两天刚弄清楚书籍简介里这句“What advantage does the Phillips-head screw have over its single-grooved predecessor”的实际原因

@vjay_pan 这个书应该很有意思! 前两天刚弄清楚书籍简介里这句“What advantage does the Phillips-head screw have over its single-grooved predecessor”的实际原因

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