A.改變主流道 B.改變進(jìn)澆口 C.改變冷料井 D.改變排氣
A.0.01~0.05 B.0.05~0.2 C.0.2~0.5 D.0.005~0.01
A.116°~118° B.120°~125° C.135°~150° D.90°~100°