Coarse bubble diffusers are commonly used for pollution control technology, they are used to separate or mix waste water product for sewage treatment plant. They produce 1/4 to 1/2 inch bubbles which rise rapidly from the floor of a waste-water treatment plant or sewage treatmentmore...
A Dichroscope shows whether or not a stone is dichroic (reflects 2 colors). This can be helpful in differentiating stones of the same color from one another. Dichroscopes can be useful with identifying gemstones that are still in the rough and when stones are set and difficult tomore...
A Dichroscope shows whether or not a stone is dichroic (reflects 2 colors). This can be helpful in differentiating stones of the same color from one another. Dichroscopes can be useful with identifying gemstones that are still in the rough and when stones are set and difficult tomore...
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