Qhia koj txog peb lub rooj cob qhia thiab cov khoom lag luam, peb cov khoom siv dav siv hauv kev sib txuas ncaj qha rau cov kav dej hauv tsev kho mob & sau cov pa oxygen cylinders / kev lag luam txiav laser / nuv ntses ua liaj ua teb / oxygen-enriched combustion / altitude oxygen absorption / oxidation cov tshuaj tiv thaiv / thermal zog tsim.
Post lub sij hawm: Apr-08-2022