http%3A%2F%2Fwww.phiko.kr%2Fbbs%2Fboard.php%3Fbo_table%3Dz4_04%26wr_id%3D5564
2000 ppm %EC%9D%B4%EB%A9%B4 %EB%AC%B8%EC%A0%9C%EC%9D%B8%EA%B1%B0%EC%A3%A0