fireproof door lock for ship: 1 certificate: CCS; 2 material: Stainless steel; 3 suitable door thickness: 38-42mm. fireproof door lock for ship:1. Certificate: ISO9001:2000, CCS;2. Characteristis: fireproof, durable;3. Specification:The lock contains double bolts, single cylinders, no knob and master key mechanism,The lock can not be opened inside when it is locked by key outside;4. Suitable ...