它只需简单培训，又无需外部能量、电、设备、干净的水或无菌环境。
Only minimal training is required and no external power, electricity, equipment, clean water, or sterile environment is needed.
为了在无菌环境中操作，打印机应安装在在标准实验室的生物安全柜中。
The printer fits inside a standard laboratory biosafety cabinet, for sterile operation.
如果没有这样的检测和弹出系统，封盖必须在无菌环境操作而不是洁净环境。
If there is no such detection and rejection system in place, capping must be performed as an aseptic process rather than as a clean process.
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