Qib ntawm baltic birch plywood raug soj ntsuam raws li qhov tsis xws luag xws li pob qhov rooj (nyob pob qhov rooj, pob qhov rooj tuag, cov pob txha tawg), lwj (heartwood decay, sapwood decay), kab qhov muag (kab qhov muag loj, kab me me, kab mob epidermal kab grooves), tawg (los ntawm kab nrib pleb, tsis yog los ntawm kab nrib pleb), khoov (transv ...
Nyeem ntxiv