n.白材；白木質(zhì)；邊料

Tough and rich flexibility, alburnum is shown weak ivory, duramen by fallow differ to nigger-brown. 堅(jiān)韌而富有彈性，邊材呈淡乳白色，心材由淡棕色到深棕色不等。

The study objects is ninety standard samples, and then make different experiments according to the duramen and alburnum or transverse section, chordal, radial. 本文用90個規(guī)格試件為研究對象，嚴(yán)格按照國家標(biāo)準(zhǔn)按心邊材以及橫切面、弦切面和徑切面分組實(shí)驗(yàn)。