Tsis siv neeg cim kab cav rau vamp

Qhov no tsis siv neeg kos kab kab tshuab yog khau raj kab ntawv sab saud tshuab feem ntau yog siv cov kab cim rau khau khiab hauv nkawm khau. Qhov tseeb, kos cim kab ntawm vamp yog ob qhov thib ob ntawm nkawm khau ua tom qab txiav los ntawm laser tej tshuab lossis sib riam. Cov tsoos kab kos duab kos duab yog tsim los ntawm txhais tes nrog kub siab dua rov qab kho dua tshiab thiab phau ntawv ntsuam xyuas kev luam ntawv. Nov yog lub tshuab tsis siv neeg hloov cov txheej txheem los ntawm txhais tes ua kom khau. Nws yog 5-8 npaug sai dua li phau ntawv thiab qhov raug yog qhov siab dua 50% tshaj li.