42 Conjunction with Services-Namely, Technical Writing and Editing, Graphic Arts, Typesetting, Copy Preparation, Illustrating-Namely, Writing Test Manuals, Operations Manuals, and Procedural Manuals Engineering, and Testing Services-Namely, Environmental Testing, Vibration Testing, Shock Testing, Hydraulic Testing, Hermetic Testing, Life and Reliability Testing, Maintainability Testing, Material Science Testing, Electrical and Electronic Testing, Electromagnetic Interference Testing, and Corrosion Testing, and Design Services Relating to Marine Engineering and to Designing Hydraulic Test Equipment and Metal Cabinets, Stands, Shelves, and Equipment Bases for Others