Duniya mai ban sha'awa na girman bututu: acronyms IPS, NPS, ID, DN, NB, SCH, SRL, DRL nufi?
1.DN shine kalmomin Turai waɗanda ke nufin "diamita na al'ada", daidai da NPS, DN shine lokutan NPS 25 (misali NPS 4 = DN 4X25 = DN 100).
2.NB yana nufin "nominal bore", ID yana nufin "diamita na ciki".
3.SRL DA DRL (Tsawon Bututu)
SRL DA DRL sharuɗɗan ne masu alaƙa da tsayin bututu.SRL yana nufin "tsawon bazuwar guda ɗaya", DRL don "tsawon bazuwar ninki biyu"
a.SRL bututu suna da kowane ainihin tsayi tsakanin mita 5 zuwa 7 (watau "bazuwar").
b.DRL bututu suna da kowane ainihin tsayi tsakanin mita 11-13.
Lokacin aikawa: Agusta-16-2020