han sindicado
Present perfect ellos/ellas/ustedes conjugation of sindicar.

sindicar

En las pequeñas localidades y vecindarios de todo el país se han sindicado 37.784 empresas (94%) y 5.300 empresas (93%) respectivamente.
In small towns and neighbourhoods nationwide, 37,784 enterprises (94 per cent) and 5,300 enterprises (93 per cent) respectively, have been unionized.
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