SHANGHAI, Nov 25 (SMM) - Copper inventories in the domestic bonded zones added 2,000 mt from November 18 to 26,600 mt as of November 25. Inventory in the Shanghai bonded zone grew 2,600 mt to 23,000 mt, and that in the Guangdong bonded zone dipped 600 mt to 3,600 mt. SHFE/LME copper price ratio was not conducive to imports this week, and the customs clearance slowed down. Some traders converted bills of lading into warrants and moved them into bonded warehouses to ship after the price ratio grew, pushing up the bonded zone inventories.