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the methyl groups (ch ) relative to the methyl groups in neighboring monomer units (see above ). the tacticity of polypropylene can be chosen by the choice of an appropriate catalyst. catalysts[ edit ] the properties of pp are strongly affected by its tacticity , the orientation of the methyl groups...
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it allows the voltage ratio of the transformer to be adjusted to suit voltage requirements at its installation site. the tap changing apparatus is for switching the turns ratio between the primary and secondary windings of a three phase transformer. we offer off-circuit tap changer of high quality for...
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pressure drop. it is a normally closed valve, which opens in response to a remote pressure command and shuts in the absence that command. installation: . ensure enough space around the valve assembly for future maintenance and adjustments. . prior to valve installation, flush the pipeline to insure flow of...
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