Vibratom
振动磨机; 振动球磨机
🗣️ 情景例句
I've only been waiting for an hour.
我已经等了一个小时了。
How long will I have to wait?
我要等候多久呢？
Mr Hu stood at the starting line. All the runners got ready to run.
胡先生站在起跑线上。所有的运动员都做好了起跑准备。