Lub tuam txhab tsuas yog tsim thiab xa tawm ob-axis xov dov tshuab, peb-axis xov dov tshuab, spline tshuab, txoj kab uas hla txo cov cav tov, hoop dabtsi yog khoov tshuab, hollow grouting thauj tog rau nkoj ntau lawm kab, thiab lwm yam.