| |||
bottom of thread | |||
gap | |||
thread gap | |||
vee of the thread | |||
thread vee; thread root (Киселев) |
впадина резьбы: 16 phrases, 8 sujets |
Champs de pétrole | 1 |
Forage | 2 |
Makarov | 1 |
Mécanique | 2 |
Pétrole et gaz | 1 |
Technologie | 6 |
Technologie pétrolière et gazière | 2 |
Transport | 1 |