Double crank four ring - plate type cycloid drive is a new type drive.双曲柄四环板式针摆行星传动是一种新型传动.The vibration performance of cycloid ball planetary reducer was analyzed.分析摆线钢球行星传动减速器的振动特性.For this reason the cycloid is called...
北毛鼻袋熊是夜行性动物, 人类很少能看到它们.Nocturnal creatures, the northern hairy - nosed wombat is rarely seen by humans.袋熊、袋鼠都是澳大利亚的有袋类动物.The wombat and kangaroo are both marsupials in Australia.袋熊停在护林员的车辆前面.A wombat stops in front a ran...