viewimage.php?id=3abcc2&no=24b0d769e1d32ca73ded80fa11d028310c0dd27a92083f8186361ad12cefc0cf4854386cf98f0f572d12957864e6974308d46c66b725c2e8337197872141e6954575837fc5be3f6ef0f2ca

중간에 조선기술 발전이 진짜 없었음?