Pom cov hlau tawg, feem ntau yog vim cov ntawv thov tsis raug lossis cov tsis zoo ntawm cov hlau tsis pom, uas txhais tau hais tias qhov kev sib khi ntawm cov khoom siv ntau yam tsis muaj zog, ua rau txiav kom nkag mus rau cov saw hlau, thiab tsis ntev magma lossis txiav cov hlau tsis muaj hlau. lub cev Ib feem ntawm kev sib tiv tauj thiab kev sib txhuam ntawm txoj hlua hlau thiab txoj hlua hlau, txoj xov txuas rau txoj hlua hlau pib tawg, uas kuj yuav yog vim siv tsis raug ntawm cov neeg ua hauj lwm. Lub xaim hlua hlau pob txha kuj yog los ntawm qhov kev xaiv tsis ncaj ncees ntawm xaim hlua thiab kev kho cua sov tsis zoo tom qab kev txhaj tshuaj molding.
Cov txheej txheem txias txias kev coj ua uas feem ntau siv kuj tseem yog qhov ua rau ntog qe menyuam. Qee zaum, vim yog cov txheej txheem dej lwg tsis tsim nyog, paraffin infiltrates ntawm cov hlau lub cev thiab lub cev hlau beaded. Qee zaum qhov teeb meem tseem cuam tshuam txog kev ntxuav tsis raug ntawm lub beaded steel lub cev. Yog li thaum peb xaiv lub xov hlau pom, peb yuav tsum xaiv tus kws tshaj lij kev lag luam, thiab qhov zoo ntawm cov hlau hlau tau pom yog qhov tseem ceeb tshaj plaws.
