青云翻译

Load perpendicular to the contact surface, that is, completely smooth contact surface, excluding the friction between the object and contact

Load perpendicular to the surface, that is, the contact surface completely smooth, disregarded and contact objects between the friction

Shoulders is vertical to the faying surface, in other words, the faying surface is completely smooth, does not count with the contact object between the friction force

false

Load perpendicular to the surface, that is, the contact surface completely smooth, disregarded and contact objects between the friction