求翻译：设备按厂房及工艺条件定位后，应预先做好主机及风机的基础，地面需平整，以确保整机运行的平稳性、牢固性是什么意思？

After positioning equipment plant and process conditions, should do a good host and fan base, required a flat on the ground, to ensure that the machine running smoothness, robustness