4 Hom Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Qhov tshwm sim ntawm kev sib tsoo hluav taws yog universal thiab tuaj yeem tshwm sim hauv yuav luag txhua lub chaw soj nstuam. Cov laj thawj ncaj qha ntawm cov xwm txheej zoo li no yog: 1. Tsis nco qab kaw lub hwj chim, ua rau cov khoom siv lossis cov khoom siv hluav taws xob ua kom lub zog ntev, qhov kub thiab txias dhau, ua rau hluav taws kub;