methods:the methods of opening skull and free falling body was used to cause open cerebral laceration in rats.
方法:采用开颅和自由落体法相结合,造成开放性脑挫裂伤大鼠模型。在y型水迷路中测定大鼠的记忆力;
a solution for eastward deflection of a free falling body in an inertial system is given, which an engineering student studying physics course can understand easily.
在惯性系中分析了落体偏东现象,简单明了,使工科学生也能理解.。
the automatic assemble machine utilized the free falling body assemble method, presented in the paper.
自动装配机利用了本文提出的自由落体式装配方法。