May 9 (Reuters) - GR Engineering Services Ltd GNG.AX :
* Upstream production solutions enters into operations and maintenance services
agreement for the laminaria-corallina oil field
* Says revenue under the contract is expected to be approximately $30 million
per annum
* Says under contract upstream ps has been engaged to provide offshore and
onshore operations and maintenance services to noga
* Source text for Eikon ID:nASX5x0X3K
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