Both the companies had cleared the technical evaluation and field trials.

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Once candidate sites for World Heritage status have been placed on the UK Tentative List they are invited to put forward a more detailed case for nomination and participate in a Technical Evaluation.

UNESCO: Nominations for World Heritage

In most cases, they work in partnership with African non-profit organisations, providing technical support, monitoring, evaluation and reporting.

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For a variety of technical and economic reasons, evaluation programs as proposed by Huawei and ZTE are less useful than one might expect.

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Experts from Creative Associates International, Inc. with technical assistance from researchers of University of Massachusetts (USA) conducted external evaluation in mathematics and reading upon two groups of students through pre and post-test with the same content.

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"The evaluation concluded that any undergrounding of the main 400kV line cannot be justified on the grounds of cost, technical difficulties and very limited environmental benefits, " its report said.

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