挤压铸造
参考答案：是对定量浇入铸型型腔中的液态金属施加较大的机械压力，使其成形、结晶凝固而获得零件毛坯的一种工艺方法。
瘀血导致的疼痛主要表现为
A.胀痛
B.刺痛
C.窜痛
D.灼痛
E.隐痛
What did I do in Washington().
A.I worked in a drugstore.
B.I worked in a copy room.
C.I did research about my family.
D.I worked in a library.
