The main return cam mechanism has been widely applied in the pump transportation mechanism.
主回凸轮机构在泵送机构中应用广泛。
I've been away for a month. In the month, my 2 years old camera died. And for return, is disappointed with my N73's cam.
走了一个月，被我折磨了两年的相机终于挂了，换来的是对N73拍照效果的失望（除了微距）。
I've been away for a month. In the month, my 2 years old camera died. And for return, is disappointed with my N73's cam.
走了一个月，被我折磨了两年的相机终于挂了，换来的是对N73拍照效果的失望（除了微距）。
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