t/tľRed Oak,/יľWhite Oak,ˮ/ϞľWhite ASH,S/Z鱣Poplar,ɳľľ}ľ......">
t/tľRed Oak,/יľWhite Oak,ˮ/ϞľWhite ASH,S/Z鱣Poplar,ɳľľ}ľ2.Ҏ
ȣ4/41 =2.54cm.
5/4 1.25 =3.2cm.
6/4 1.5 =3.8cm
8/4 2 =5cm
ȣRW(Ȼ4+ )
LȣRW(ȻL4+ )