Kev nce hnub no, Tsoom Fwv Teb Chaws Reserve tau nce cov paj laum los ntawm 75 lub hauv paus ntsiab lus, uas yog lub hlis thib ob ntawm kev nce nqi paj siab. Qhov cuam tshuam ntawm qhov kev nce nqi no tseem tsis tau pom meej meej, tab sis qhov kev cuam tshuam no yuav tsis yog-linear, thiab lub siab ntawm ntau yam khoom vaj khoom tsev yuav maj mam nce. Nrog rau Fed nce cov paj laum, nce thoob ntiaj teb cov paj laum yuav yog "lub ntsiab lus tseem ceeb" ntawm kev lag luam nyiaj txiag thoob ntiaj teb hauv lub xyoo thib ob. Kev poob qis ntawm cov khoom lag luam thoob ntiaj teb tuaj yeem nce sai hauv lub xyoo thib ob ib nrab, ua rau muaj kev puas tsuaj rau cov nqi hlau ore hauv nruab nrab thiab ntev. Txawm li cas los xij, tib lub sijhawm, cov khoom siv hlau hauv tsev thiab lwm yam khoom lag luam yuav tsum tau them sai sai rau kev hloov pauv ntawm cov khoom siv. Nws yog xav tias lub sij hawm luv luvgalvanized steel phajyuav tseem ceeb heev.
Qhov thib ob, tus nqi nce ntawm coke yog hais txog av. Tsis ntev los no, cov txheej txheem mus sij hawm ntev ntawm steelmaking tau raug nthuav tawm, tus nqi ntawm cov khoom siv raw hauv qhov chaw ua lag luam tsis muaj zog, thiab tus nqi yuav tsum poob qis, uas yog teeb meem rau cov nqi hlau. Txawm hais tias tus nqi steel tam sim no tau nce siab nrog kev nce ntawm yav tom ntej, nws tseem yuav tsum tau ceeb toom rau qhov kev pheej hmoo ntawm cov nqi poob.Galvanized steel phajtus nqi tseem yuav pom.
