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202019-07The ultraviolet aging test chamber USES the ultraviolet lamp as the lamp source, and simulates the ultraviolet radiation source in the natural sunlightAnd cold doubt...
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222019-06It is well known that the flow rate and velocity of the valve mainly depends on the size of the valve, but also with the valve structure type of the resistance to the medium...
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232019-04Valve characteristics, selection procedures, selection basis, selection should follow the principles...
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