1. Txhawm rau txhim kho anisotropy ntawm ntuj ntoo kom ntau li ntau tau, kom cov yam ntxwv ntawm plywood zoo ib yam thiab cov duab ruaj khov, lub hauv paus ntsiab lus ntawm symmetry yuav tsum tau ua raws li thaum tsim ntau txheej boards. Lub hauv paus ntsiab lus ntawm symmetry yog yuav tsum tau hais tias lub veneer ntawm ob sab ntawm lub symmetrical center dav hlau ntawm lub plywood yuav tsum symmetrical nrog ib tug tsis hais qhov xwm ntawm cov ntoo, lub thickness ntawm lub veneer, tus naj npawb ntawm cov txheej, cov kev taw qhia ntawm cov ntoo. fiber, noo noo cov ntsiab lus, thiab lwm yam.
2. Thaum tsim ntau txheej boards, lub hauv paus ntsiab lus hais tias cov fibers ntawm cov khaubncaws sab nraud povtseg ntawm veneer yuav tsum yog perpendicular rau ib leeg. Ntawd yog, nyob rau hauv tib lub plywood, veneer ntawm ib hom thiab tuab yuav siv tau, los yog veneer ntawm ntau hom thiab tuab yuav siv tau, tab sis ob txheej ntawm veneer hom thiab thickness uas yog symmetrical rau ib leeg ntawm ob sab ntawm lub symmetrical center dav hlau yuav tsum zoo ib yam, thiab cov fibers ntawm cov nyob ib sab txheej ntawm veneer yog perpendicular rau ib leeg.
