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Laminar flow hoods and hepa filter must be certified every 6 months. The type of environment that a laminar flow hood provide ISO 5, which is formerly known as a Class 100 area.
30 minutes
to calculate the area of the front surface of a box you should
Yes... If the surface is smooth, then the ball should bounce fine but if the surface is rough the ball will bounce all over the place.
Dark, matt surfaces absorbs more heat. It should be a light, shiny surface as it doesn't absorb as much heat and not overheat it.
Equipment must be CLEANED at least every 24 hours.
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So the paint will stick and not peel off later.
it has to be cleaned up quickly because it wil stick to the surface and would be hard to clean up and could be a danger hazard.
Smooth, non-porous, unpainted, easily cleaned, level, undamaged.
Neither unless it is processed and cleaned. Unclean water should not be drunk.
0.2 Micron
Yes, cleaning a silver coin will reduce its value. Coins that are cleaned can be easily detected. The coin will not be worthless, but may fetch a lower price. It is better to leave it tarnished.
A hamster cage should be cleaned weekly.
notning on it with gas
A horses stall should be cleaned every day.
Laminar flow hoods and hepa filter must be certified every 6 months. The type of environment that a laminar flow hood provide ISO 5, which is formerly known as a Class 100 area.