Bearings
Flanged fittings
Flammability
Type d protected electrical equipment
Explosive atmospheres
Electric enclosures
Holes
Explosions
Adhesive-bonded joints
Grades (quality)
Joints
Testing conditions
Type testing
Electrical insulation
Spigot-and-socket joints
Leak tests
Dimensions
Screwed fittings
Thermal testing
Protected electrical equipment
Electrical safety
Roughness (surface)
Bushes (mechanical components)
Fire tests
Mechanical testing
Seals
Labyrinth seals
Pressure testing
Dimensional tolerances