A.10~20cm B.20~30cm C.30~40cm D.40~50cm
(A)外觀檢驗和機械物理性能檢驗 (B)外觀檢驗和尺寸檢驗 (C)尺寸檢驗和化學成分檢驗 (D)機械物理性能檢驗和化學成分檢驗
A.5%~10% B.5%~15% C.10%~15% D.10%~20%