Tsev pam tuag chaw ua chaw ua chaw pw (chaw ua noj ua haus kom tau raws li cov thawj coj ntawm kev pam tuag, cov tub rog, thiab lwmy lwm qhov ntsuas pa taws thiab kub thiab txias. Cov kab ke no tau nruab nrog lub luag haujlwm hnyav nyob ruaj ruaj khov khov kho system kom txaus ntawm kev thau khoom thiab thau khoom.