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2. Ambient conditions, movement and load
2.1 Atmosphere
We distinguish between :
the vacuum ;
gas environment: lubrication prohibited or lubrication permitted, with low, normal and high temperatures for each case;
liquid atmosphere without surface lubricating properties, e.g. water or petrol;
the crankcase environment forms an oil reservoir, allowing all forms of lubrication - splash, oil bath or pressure - to be carried out without complication;
the purpose-built housing bearing.
For greater clarity, we'll refer to these moods by the following numbers.
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Ambient conditions, movement and load