[SMM Survey: Domestic Primary Lead Smelters Underwent Maintenance and Production Cuts in September, While Raw Material Inventory Continued to Grow (with Maintenance and Production Scheduling Survey for September-October)] According to the SMM survey on production scheduling, a number of domestic primary lead smelters underwent maintenance in September, with the maintenance cycle ranging from 7 to 20 days. Although domestic smelters mainly focused on maintenance and production cuts in September, they continued to stockpile lead concentrate raw materials, and the number of days of raw material inventory for large and medium-sized smelters still continued to increase...