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Lock parts castings, door and window components are the most commonly used casting products in the construction industry, including locks, locks, hinges, handles, etc. These locks are usually small in size, weighing between 10 and 250g, very precise in size, with high tolerance requirements, important linear dimensional tolerances are usually +/-0.15mm, for critical areas, tolerances can be +/-0.03mm, The surface finish in the visible area must be very smooth. Locks can be produced by several different production methods such as zinc... more