Tus qauv ntawm lub rooj zaum rooj zaum tsuas yog suav nrog cov ntu hauv qab no:
Ncej: Tus ncej ntawm lub rooj zaum yog qhov tseem ceeb uas txhawb nqa tag nrho lub rooj zaum, thiab feem ntau yog ua ntoo lossis hlau. Ntawm cov khoom ntoo ntoo, larch thiab beech yog cov khoom siv ntau vim tias lawv muaj zog thiab ruaj khov. Cov hlau thav ntawv feem ntau siv cov hlau lossis cov kav hlau hlau, tab sis koj yuav tsum tau them sai sai rau seb puas siv lossis siv cov ntaub ntawv qis dua.
Springs thiab bandages: lub springs feem ntau siv nyob rau hauv lub rooj zaum tau siv sab hauv lub rooj zaum yog Serpentine Springs thiab Pocketed Chev Springs. Lub caij nplooj ntoo hlav serpentine yog khoov rau hauv cov serpentine los ntawm cov hlau bar, thiab muaj elasticity zoo thiab ruaj khov; Cov hnab tshos coil caij nplooj ntoos hlav yog muab lub caij nplooj ntoo hlav rau hauv lub hnab uas tsis yog-Woven kom muab kev txhawb nqa zoo dua thiab xis nyob. Cov ntaub qhwv tau siv los txhim kho cov quav, thiab cov ntaub qhwv roj hmab feem ntau siv los ua kom ntseeg tau tias yog elasticity thiab kev ruaj khov ntawm lub rooj zaum.
Txhaws: qhov txhaws ntawm lub rooj zaum tsuas yog suav nrog cov duab kos thiab siab-elasticity sponges. High-qhov ntom ntom nti muab cov qauv elasticity zoo thiab txhawb nqa, thaum ywj siab lub hnab tshos coil springs kom ntseeg tau cov kev txhawb nqa ib feem. Ib qho ntxiv, hauv qab thiab muaj fiber ntau cov paj rwb tseem siv tau los ua kom muaj kev nplij siab thiab kov.
Cov khoom siv saum npoo: cov khoom siv ntawm rooj zaum yog feem ntau ntawm cov ntaub lossis tawv. Thaum xaiv, koj yuav tsum xav txog nws txoj kev hnav tsis kam, nruj thiab xim sib txuam.