我这里有个子弹壳，弹头口径8mm，蛋壳长38mm.蛋壳后面有“661”“72”两组数据。有没懂的人解释一下是什么意思？http://a.hiphotos.baidu.com/forum/wh%3D400%2C640%3Bq%3D45%3Bg%3D0/sign=738f78a8fadcd100cdc9f02542bb6b26/4fda8d4bd11373f0ca4abd3aa60f4bfbfaed04b3.jpg http://a.hiphotos.baidu.com/forum/wh%3D400%2C640%3Bq%3D45%3Bg%3D0/sign=b0b2b6a8249759ee4a0568cf82cb6f20/28991af33a87e9508d6221c912385343faf2b4bc.jpg http://f.hiphotos.baidu.com/forum/wh%3D400%2C640%3Bq%3D45%3Bg%3D0/sign=7b496a24c91349547e4be060667ebe6e/278be8fcc3cec3fdd99575d0d488d43f86942701.jpg
