Kev faib khoom:
(1) Cov cim: daim duab lossis lub rooj tsavxwm yog roj thiab du heev.
(2) Acrylic Identification Phaj: Cov khoom siv acrylic yog siv los ua cov khoom tseem ceeb ntawm pawg thawj coj saib.
(3) Luminous material sign: luminous material sign (uas yog, neon teeb)
（4） Lub teeb hluav taws xob daim phiaj qhia lub phaj: siv lub teeb pom kev zoo los yog lub teeb ci kom ua tiav cov xim ib leeg lossis xim ua haujlwm.
（5 plate Cov cim phaj hlau: thaum tsis muaj cov phaj tshwj xeeb, cov hlau tau siv los ua cov khoom tseem ceeb ntawm cov phaj saum npoo lossis cov ntawv ntawm phaj thiab hlau yog siv los ua lub luag haujlwm tseem ceeb ntawm kev txheeb xyuas.
Kev faib tawm morphological:
（1） Ntsug: tag nrho cov nplai yog qhov ntev ntsug, thiab tag nrho saum npoo feem ntau yog siv ua lub cim.
（2）. kem hauv av: kab rov tav, ntsug thiab peb-dimensional cim cim cim ntawm qee qhov kev teeb tsa hauv av
（3 type Hom kab rov tav: tag nrho feem sib piv yog qhov ntev ntawm kab rov tav, thiab tag nrho saum npoo yog siv los ua cim cim, uas feem ntau tuaj yeem pom ntawm phab ntsa ntawm cov khw me thiab cov tsev loj.
（4） Kev tawm: thaum kis tawm ntawm phab ntsa ntawm lub tsev, tag nrho lub ntsej muag tshwj tsis yog sab nraub qaum lossis phab ntsa ntawm ob sab, ob sab yog siv los ua cov cim qhia ntawm tus neeg nqa khoom tshaj tawm, xws li daim paib peb sab.
（5 type Hom ru tsev: hais txog lub phaj-zoo li cov movable cubic lossis cov cim qhia tsis tseeb uas tau teeb tsa saum lub ru tsev ntawm lub tsev thiab dai lossis muab tso rau nws.
