Yam ntxwv Ntawm Hlau Drawing Zaj duab xis

Cov khoom lag luam muaj qhov pom kev pom tseeb, muaj zog peb-dimensional kev nkag siab, siab ci ci, zoo thiab cov duab kos duab zoo ib yam, uas ua rau tib neeg xav tias zoo nkauj thiab zoo. Cov khoom siv kos duab zaj duab xis muaj cov txheej txheem zoo heev, kho kom zoo nkauj nto, corrosion tsis kam, khawb tsis kam, kub tsis kam thiab lwm yam. Nws tuaj yeem siv los ua cov hlau kos duab hloov kub stamping zaj duab xis, xws li kub stamping duab ncej, khoom siv hauv tsev / tsev hlau kos duab zoo nkauj zaj duab xis, ib txheej hlau kos duab zaj duab xis thiab PET sib xyaw hlau kos duab zaj duab xis.