li-acronyms IPS, NPS, ID, DN, NB, SCH, SRL, DRL li bolela'ng?

Lefatše le tsotehang la boholo ba liphaephe: li-acronyms IPS, NPS, ID, DN, NB, SCH, SRL, DRL li bolela?

1.DN ke mantsoe a Europe a bolelang "bophahamo bo tloaelehileng", bo lekanang le NPS, DN ke NPS makhetlo a 25 (mohlala NPS 4=DN 4X25= DN 100).

2.NB e bolela "bore ka lebitso", ID e bolela "diameter ea ka hare".

3.SRL LE DRL(Bolelele ba Pipe)

SRL LE DRL ke mantsoe a amanang le bolelele ba liphaephe.SRL e emetse "single random length", DRL bakeng sa "double random length"

Liphaephe tsa a.SRL li na le bolelele ba 'nete pakeng tsa 5 le 7 metres (e leng "random").

Liphaephe tsa b.DRL li na le bolelele ba 'nete pakeng tsa limithara tse 11-13.