Cov tsav hluav taws xob ua hluav taws xob tau dhau los ua cov khoom lag luam hauv cov tshuab ua lag luam. Qhov tseem ceeb tshaj plaws nyob rau hauv cov li qub tsis siv neeg yog hluav taws xob ua hluav taws xob, uas tuaj yeem txuag tau lub zog siv thaum ua haujlwm. Qhov zoo thiab kev ua tau ntawm hluav taws xob ua ke txiav txim siab seb lawv puas tuaj yeem txhim kho txoj haujlwm ua haujlwm thiab txuag hluav taws xob thaum siv. Muaj ntau lub cav hluav taws xob, thiab muaj cov angular stroke hluav taws xob lub taub hau thiab lwm yam sib txawv ntawm lub taub hau hluav taws xob nyob rau tom khw. Lub taub hau siv hluav taws xob feem ntau yog lub taub hau hluav taws xob feem ntau.
