Hais txog qhov zoo sib xws ntawm cov qib ntawm cov hlau ntshiab thiab cov teb chaws xws li Tebchaws Meskas, nws tsim nyog sau cia tias cov txheej txheem rau cov hlau, suav nrog cov hlau ntshiab, tuaj yeem sib txawv ntawm ntau lub teb chaws thiab cov qauv. Txawm li cas los xij, qee qhov kev sib piv dav dav tuaj yeem ua tau.
Hauv Suav teb, cov hlau ntshiab feem ntau tau muab cais raws li nws cov khoom tshwj xeeb thiab kev npaj siv. Ib yam li ntawd, hauv Tebchaws Meskas thiab lwm lub tebchaws, cov hlau ntshiab thiab lwm yam hlau kuj tau muab qhab nia raws li lawv cov khoom sib xyaw, cov khoom siv kho tshuab, thiab kev siv.
ASTM (American Society for Testing and Materials) cov qauv siv dav hauv Tebchaws Meskas rau kev muab cov hlau, suav nrog hlau thiab hlau. Rau cov hlau ntshiab, txawm hais tias yuav tsis muaj qhov sib npaug ncaj qha ntawm Tuam Tshoj thiab Tebchaws Meskas vim qhov sib txawv ntawm cov qauv thiab kev muab qhab nia, cov tshuaj muaj pes tsawg leeg thiab cov khoom siv lub cev ntawm cov hlau ntshiab tseem zoo ib yam nyob hauv ntau lub teb chaws.
Piv txwv li, cov hlau ntshiab feem ntau muaj qhov sib nqus siab permeability thiab siv rau hauv cov ntawv thov uas nws cov khoom sib nqus yog qhov tseem ceeb, xws li hauv electromagnets thiab transformers. Hauv Suav teb thiab Tebchaws Meskas, cov hlau ntshiab uas siv rau lub hom phiaj no yuav tsum tau ua kom tau raws li qee yam qauv rau kev purity thiab sib nqus ua haujlwm.
Txhawm rau nrhiav cov qib sib npaug ntawm Tuam Tshoj thiab Tebchaws Meskas (lossis lwm lub tebchaws), nws yog qhov yuav tsum tau sab laj nrog tus kws tsim khoom siv lossis xa mus rau cov koom haum thoob ntiaj teb xws li ISO (International Organization for Standardization). Cov koom haum no ua haujlwm sib haum xeeb thoob plaws lub tebchaws sib txawv, ua kom yooj yim dua los sib piv thiab siv cov ntaub ntawv thoob ntiaj teb.
Hauv cov ntsiab lus, txawm hais tias yuav tsis muaj qhov sib npaug ncaj qha rau cov hlau ntshiab nruab nrab ntawm Tuam Tshoj thiab Tebchaws Meskas, cov khoom siv tseem ceeb thiab kev siv cov hlau ntshiab nyob ib puag ncig ntawm cov txheej txheem sib txawv. Rau kev sib piv cov qib tshwj xeeb, kev sab laj nrog cov kws tshaj lij lossis siv cov qauv thoob ntiaj teb raug pom zoo.