Lub tsib qhov chaw ntawm peb-seem nqus tau tshuab hluav taws xob vuam yog ua tiav nrog qhov sib nrug ntawm 100 * 100, thiab tau sau nrog cov xov hlau ntxaij. Lub qhov yog los ntawm qhov, tsis muaj nqes hav ...

Nrog kev txhim kho kev lag luam sai ntawm kev tsim kev lag luam machinery, hloov cov khoom lag luam yog tau nrawm dua thiab nrawm dua thiab hloov cov roj hloov los ntawm S ...