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2015-09-29T20:54:19+08:00

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On the other hand, because The HPO is longer and can easily crash into the cover slip and slide.
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2015-10-03T13:50:31+08:00

when you use the fine adjustment knob the movement of the objective will be minimal since the HPO is longer than the other objectives lesser risk of breaking the slide will occur if you use the fine adjustment  knob
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