Cov hau kev hauv qab no tuaj yeem siv kom paub qhov txawv sai ntawm tooj liab xaim thiab tooj-clad txhuas hlau hlau:
Tsos pom
Tooj liab hlau: nws yog purplish liab los yog xim liab-xim av hauv cov xim, nrog cov xim du thiab nws yog xim hlau luster.
Tooj liab-clad aluminium hlau: nws yog greyish-dawb lossis dawb} nws cov nplaim hluav taws xob thiab muaj cov ntsej muag liab qab {{}
Lub cev sib piv
Cov xaim tooj liab muaj qhov sib txawv . tooj liab xaim hluav taws xob ntau dua li tooj liab aluminium hlau {}}
Koj tuaj yeem nqa cov hlau tooj liab thiab tooj-clad aluminium hlau ntawm tib lub ntev thiab sib piv lawv cov hlau hnyav feem ntau yog hnyav dua.
