http://pastport.jp/user/ldingu ja-JP Common defects of cast iron castings are: air holes, sticky sand, sand inclusions, sand holes, bulging sand, cold partition, insufficient pouring, shrinkage, shrinkage, lack of meat, sarcoma, etc. Solutions to casting defects: casting defects such as pore 2020-04-25T09:53:13+0900 http://pastport.jp/user/ldingu/timeline/There%20is%20a%20metal%20repair%20agent%20on%20the%20market ldingu http://pastport.jp/user/ldingu/timeline/There%20is%20a%20metal%20repair%20agent%20on%20the%20market