A.小于0.03% B.大于0.03% C.小于0.08% D.大于0.08%
A.0° B.45° C.90° D.180°
A.一圈一圈地 B.同時(shí) C.每圈接縫以0°為宜 D.圈與圈接縫錯(cuò)開0°