Cov khoom siv ua cov hlaws dai hollow, tshwj xeeb hauv kev tsim cov hlaws dai hollow. Nws koom ua ke cov thev naus laus zis tshiab thiab tuaj yeem ua cov khoom siv raw rau hauv cov qauv hollow tsim cov hlaws dai hollow nrog qhov hnyav sib dua thiab lub zog zoo heev. Siv tau dav rau cov teb xws li kev tsim kho thiab kev tsim kho tshuaj lom neeg, peb muab cov khoom lag luam hollow zoo rau ntau yam lag luam nrog kev ua haujlwm zoo thiab ruaj khov.
Shenzhen Hasung Precious Metals Equipment Technology Co., Ltd. yog ib lub tuam txhab kev lag luam engineering nyob rau sab qab teb ntawm Tuam Tshoj, nyob rau hauv lub nroog zoo nkauj thiab ceev tshaj plaws kev lag luam loj hlob, Shenzhen. Lub tuam txhab yog tus thawj coj thev naus laus zis hauv thaj tsam ntawm cov cua sov thiab cov khoom siv casting rau cov khoom siv hlau muaj txiaj ntsig thiab cov khoom siv tshiab.
Peb cov kev paub muaj zog hauv tshuab nqus tsev casting txuas ntxiv ua rau peb ua haujlwm rau cov neeg siv khoom lag luam los cam khwb cia high-alloyed steel, siab nqus platinum-rhodium alloy, kub thiab nyiaj, thiab lwm yam.