Respiratory protective devices : threads for facepieces

Eitemau Tebyg

• Respiratory profective devices : threads for facepieces
  gan: 8096 British Standards Institution
• The tapping of holes to receive wire thread inserts : UNC and UNF threads
  gan: 8096 British Standards Institution
• Runout and lead threads for rolled threads
  gan: 8096 British Standards Institution
• Cycle threads
  gan: 8096 British Standards Institution
• Terms for cylindrical screw threads
  gan: 8096 British Standards Institution
  Cyhoeddwyd: (1984)