Cov laj thawj tseem ceeb vim li cas RV cov xov hlau tsis siv hauv kev kho kom zoo nkauj yog raws li hauv qab no:
(1) Mosquness thiab Hardness: RV xaim yog ib qho xov tooj tseem ceeb ua ke, uas yog softer ntau dua bvr hlau {}} rea tus yam ntxwv muaj qee tus yam ntxwv
Cov xov hlau muaj qhov zoo hauv qee lub sijhawm, tab sis nyob rau hauv kev kho kom zoo nkauj, lawv yuav tsum muaj cov xov hlau txhua hnub thiab tej zaum yuav muaj kev puas tsuaj thaum siv .
(2) Cov Kev Ntsuas Hluav Taws Xob: Hauv kev kho kom ruaj khov, cov xov hlau feem ntau yog siv rau cov kav hlau, xws li hluav taws xob hauv phab ntsa, cov chaw. rv xov yog mos
Nws yuav tsis ruaj khov raws li BVR lossis BV cov xov hlau thaum tsau thiab nquag kom xoob ntawm cov ntsiab lus ruaj khov .
