More than three thousand public sector workers in Wales are expected to take strike action tomorrow.
Members of the PCS union who work at coastguard stations will walk out for an hour to protest against planned station closures.
Driving test examiners, and staff at the DVLA offices in Swansea will walk out for two hours in a dispute over working conditions.
The union is protesting over plans to close a number of coastguard stations and consequently a hundred and forty jobs.
The PCS fears job losses will also happen as a result of closure of driving test centres.
The Department for Transport says it is disappointed that industrial action is being taken while it is still in talks with the union.
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