Most are produced in huge, ultra-clean factories using batch processes similar to those for making silicon chips.
大部分是在巨大的，超净的工厂中采用类似于生产硅片的工艺来分批制成的。
2
Non-contacting and wearfree magnetic bearings are used in ultra-clean atmospheres and in extreme ambient conditions.
为此，需要使用非接触式传感器，用于超清环境以及极端环境温度下的测量。
3
The makeup artist also snuck into Jackson's purpose-built shower that was always carefully sanitized and supplied with ultra-clean, plastic-wrapped towels.