Lang A4 and CA4 Lathes (Models 12A4, 14A4, 33CA4, 42CA4) Manual Lang A4 and CA4 (Models 12A4, 14A4, 33CA4, 42CA4) Lathes: Detailed Instruction Manual with some maintenance instructions and sectional drawings and a copy of the comprehensive Sales, Technical Specification and Accessories Catalogue. Manufacturers: Lang Models: 12A4 14A4 33CA4 42CA4 A4 CA4 Contents: Operators Manual