【简答题】In 1826, a Frenchman named Niepce needed pictures for his business. But he was not a good artist, so he invented a very camera. He put it in a window of his house and took a picture of his gard...
【单选题】在减速器的轴系结构中,齿轮与轴的配合应_________。
【简答题】阅读理解。 In 1826, a Frenchman named Niepce needed pictures for his business. But he was not a good artist. So he invented a very camera, He put it in a window of his house and took a picture of hi...
【判断题】在减速器的轴系结构中,齿轮与轴的配合应紧一些,定位套筒与轴的配合应松一些。