A.50% B.20% C.30% D.40%
A.溫度、時(shí)間控制不當(dāng) B.硫化罐內(nèi)鞋子過多 C.壓力控制不當(dāng) D.硫化罐內(nèi)鞋子太少
A.10~20s B.20~30s C.30~40s D.40~50s