Air filters for mechanical purposes; Back pressure valves as parts of machines; Cylinders for machines; Exhaust pipes for land vehicles; Hydraulic engines and motors; Hydraulic valve actuators; Leveling mounts for machines; Machine parts, namely, joints and joint parts for connecting sliding strips, plates and guides; Oil filters; Parts for compressed-air machines, namely, pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems sold as an integr...