????????? ????????????????????????????????????Red Oak??????White Oak??????Hard Maple??????Soft Maple??????Americantulipwood???????pc maple)?????Alder???????????Ash??????Cherry??????????????????????????????????????(300-600?/??????? ????????????????????????????????????????????? ?????? ? ???? ???????????????????????????????????????????????????????????????? ?????????????????????????,????????????????“?????????????”????????“????”????????????????????????? ??????? ????1?138 2925 5275 ????2?158 5688 3383 ???????????????????????D8?1??