Qhov ntau ntawm lub ntiaj teb ntawm cov yeeb nkab loj: acronyms IPS, ID, DN, SCH, SCH, SRL txhais tau tias?
1.Dn yog cov ntsiab lus nyob sab Europe uas txhais tau tias "ib txwm diam", sib npaug ntawm NPS, DN yog lub sij hawm NPS 25 = DN 4X25 = DN 100).
2.NB txhais tau tias "nominal bore", id txhais tau tias "incing strone" .Lawv yog ob qho tib si saternonms loj (nps).
3.SRL thiab DRL (Yeeb Nkab Ntev)
SRL thiab DRL tau nqe lus ntsig txog qhov ntev ntawm cov kav dej. SRL sawv rau "ib leeg random ntev", drl rau "ob chav random ntev"
A.srl kav muaj qhov ntev ntev ntawm 5 thiab 7 meters (piv txwv li "random").
B.DRL kav muaj qhov ntev ntev ntawm 11-13 meters.
Lub sij hawm Post: Aug-16-2020