• CTSO-C105 Optional Display Equipment For Weather And Ground Mapping Radar.pdf
• CTSO-C104 Microwave Landing System （MLS） Airborne Receiving Equipment.pdf
• CTSO-C103 Continuous Flow Oxygen Mask Assembly （For Non-Transport Category Aircraft）.pdf
• CTSO-C102 Airborne Radar Approach and Beacon Systems for Helicopters.pdf
• JIS B2004-1994 General rules for marking on valves.pdf
• BS EN 19-2002 工业阀门. 通用标记 Industrial valves. Marking of metallic valves.pdf