Hauj lwm lawm
Kev tsis
KY -} 57 Daim ntawv so ceg no yog tsim los muab kev txhawb nqa ruaj khov rau koj ob txhais ceg, lossis kev txhawb nqa cov ntshav, thiab txhim kho kom xis nyob. Txoj kev kuaj ko taw tso cai rau koj ob txhais taw mus so ib txwm, txuas ntxiv so koj cov ceg txheem ntoo.Qhov khoom siv cov khoom muag nrog kev tsim kho kom zoo rau kev txhawb nqa. Tsim los haum rau curvature ntawm koj txhais taw thiab tuaj yeem hloov kho ntsug rau cov kev xav tau sib txawv. Siv los tau yooj yim kho qhov siab ntawm ceg rest.a dav Base Tsim kom ruaj khov thaum lub sijhawm lub hauv paus kom haum rau cov plag tsev tsis sib xws.