Cov ntaub ntawv sib txawv muaj qhov sib txawv thiab ua haujlwm ntev.
DINGFEI muab cov hom hauv qab no:
Chav ua lag luam, durability 1-2 xyoo, pom los ntawm 500 ko taw deb.
Cov qauv siv hluav taws xob tau dav siv rau cov paib ceeb toom ib ntus lossis cov paib tsheb khiav ntawm cov chaw tsim kho.
Cov chav kawm engineering, 5 xyoo durability ntawm 500 ko taw deb.
Dav siv nyob rau hauv chaw nres tsheb, txoj kev ntiag tug, txoj kev nyob deb nroog.
High lub zog prisms, 5 - 7 xyoo durability, tuaj yeem pom los ntawm kwv yees li 1000 feet deb. Dav siv nyob rau hauv nroog txoj kev.
Pob zeb diamond class, 5 - 7 xyoo durability, tuaj yeem pom ntawm 1500 ko taw deb. Muab qhov pom kev zoo tshaj plaws ntawm qhov deb tshaj plaws. Dav siv nyob rau hauv txoj kev loj.
Koj tuaj yeem xaiv hom tsim nyog tshaj plaws rau koj lub logo raws li koj qhov kev thov lossis tsoomfwv cov cai hauv zos. Thov hu rau peb cov neeg ua haujlwm muag khoom, lawv yuav muab cov kev daws teeb meem zoo tshaj plaws los pab koj.
