guanyuqimodefuzheli，yibanlaijiang，tubuliangyueda，qimoyuehou
，fuzheliyuexiao。gecengdetubuliangbutong
，houdubutong

，duiyuzhenggeqimoeryan，jiegoubutong，fuzhelihuiyousuobutong。duiyucaiyongtongyizhongfangshilaituzhuangdetongyigewupin，butongquyufuzhelibutong，zhuyaoshiyouyutushibujunyun

、粗糙度不均勻以及木材的具體結構差異所引起的。