Raws li peb txhua tus paub, Z thoob conveyor yog dav siv rau kev lag luam sib txawv thiab txawv teb. Tab sis ntau tus neeg siv khoom sib txawv tsis paub ntau yam ntawm lawv, thiab xaiv lawv li cas. Tam sim no cia wb saib ua ke. 1) Phaj hom (Tus nqi pheej yig dua li hom chim, tab sis rau qhov siab, nws tsis yog st ...
Nyeem ntxiv