【简答题】Dear Nancy, You asked about places to go and things to do in our town. The Downtown Mall is always 51 . It’s a 52 place in the oldest part of town. There are some good stores and restaurants there. 53...
【简答题】在曲柄摇杆机构中,如何确定最小传动角。 2. 铰链四杆机构的演化方式只要有几种。 3. 在铰链四杆机构中, a=60mm,b=150mm,c=120mm,d=100mm 。分别把构件 a 、 b 、 c 、 d 作为机架,所对应的为何种类型的机构? 4. 四杆铰链机构的演化方式主要有哪几种?