Air filters for mechanical purposes; Bits for power drills; Electric screwdrivers; Hydraulic controls for machines, motors and engines; Hydraulic valve actuators; Hydraulic valves being parts of machines; Machine parts, namely, cylinders; Machine parts, namely, joints and joint parts for connecting sliding strips, plates and guides; Mufflers for motors and engines; Pneumatic controls for machines, motors and engines; Pneumatic valve actuators