- Check the sanitary joints, joints must be clean grinding rust, grease and other chemicals such as paints, acids ...., snap connections must be clean slag grinding, trimming the deep hole caught fire slag welding service;
- The ash weevil, bug wind cuts right grinding stone embankment wound up handling before installation;
- The rust, paint, sanitary abrasive chemicals from solder point to 20mm, stains attach stiffening after While grinding to flush clean with a flat no to the basic materials
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