Tuam Tshoj txoj kev lag luam loader tau ua kom muaj kev vam meej nyob rau ntau xyoo lawm. Ib qho kev qhuas tshwj xeeb uas tsim nyog tau ua tiav-thiab qhov kev txaus siab ntawm lub tebchaws- yog qhov kev tsim khoom txhua xyoo thiab kev muag khoom ntawm cov khoom thauj tau tshaj 160,000 units; Txawm tias niaj hnub no hauv Suav lag luam, muaj neeg coob coob nrog cov khoom lag luam thoob ntiaj teb, cov khoom lag luam hauv teb chaws txuas ntxiv hais kom ua lag luam feem ntau.
Xyoo 1978, Tuam Tshoj cov khoom thauj khoom txhua xyoo sawv ntawm tsuas yog 1,315 units, nrog rau tag nrho tsuas yog 9,454 units; los ntawm 2007, txawm li cas los xij, kev muag khoom tau tshaj 160,000 units. Kev xa tawm ib leeg tau nce mus txog 10,000 units-ib daim duab tshaj li tag nrho cov khoom tsim tawm ua ntej rau Kev Hloov Kho thiab Qhib - txog lub sijhawm. Ib yam li ntawd, txhua xyoo bulldozer ntau lawm hauv 1978 tsuas yog 1,909 units, nrog rau tag nrho ntawm 11,923 units. Ntshuam tseem ceeb nyob rau lub sij hawm, mus txog 3,333 units los ntawm 1980; Qhov tseem ceeb, los ntawm lub xyoo 1980s lig, kev xa khoom tuaj txog ze li 30% ntawm kev ua lag luam. Los ntawm 2007, bulldozer muag tshaj 7,390 units; Cov khoom lag luam hauv tsev tsis yog tsuas yog ntes tus tsov ntxhuav feem ntawm kev ua lag luam hauv tsev tab sis kuj tau ua tiav cov khoom xa tawm ntau heev-nrog 2,065 units xa tawm xyoo 2007 ib leeg, ib daim duab tshaj lub teb chaws tag nrho cov khoom siv bulldozer hauv xyoo 1978.
